Using the DirectShow Video Mixing Renderer 9 filter

#pragma once

#include <dshow.h>
#include <d3d9.h>
#include <vmr9.h>

#undef MessageBox
#define SAFE_RELEASE(i) {if (i) i->Release(); i = NULL;}

namespace DirectShowVMR9
{
	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary> 
	/// Summary for Form1
	///
	/// WARNING: If you change the name of this class, you will need to change the 
	///          'Resource File Name' property for the managed resource compiler tool 
	///          associated with all .resx files this class depends on.  Otherwise,
	///          the designers will not be able to interact properly with localized
	///          resources associated with this form.
	/// </summary>
	public __gc class Form1 : public System::Windows::Forms::Form
	{	
	public:
		Form1(void)
		{
			InitializeComponent();
		}
  
	protected:
		void Dispose(Boolean disposing)
		{
			if (disposing && components)
			{
				components->Dispose();
			}
			__super::Dispose(disposing);
		}
	private: System::Windows::Forms::PictureBox *  pictureBoxVMR9;
	private: System::Windows::Forms::TrackBar *  trackBarX1;
	private: System::Windows::Forms::Label *  label1;
	private: System::Windows::Forms::TrackBar *  trackBarY1;
	private: System::Windows::Forms::Label *  label2;
	private: System::Windows::Forms::TrackBar *  trackBarW1;
	private: System::Windows::Forms::Label *  label3;
	private: System::Windows::Forms::TrackBar *  trackBarH1;
	private: System::Windows::Forms::Label *  label4;
	private: System::Windows::Forms::TrackBar *  trackBarA1;
	private: System::Windows::Forms::Label *  label5;
	private: System::Windows::Forms::GroupBox *  groupBox1;
	private: System::Windows::Forms::GroupBox *  groupBox2;
	private: System::Windows::Forms::TrackBar *  trackBarA2;
	private: System::Windows::Forms::Label *  label6;
	private: System::Windows::Forms::TrackBar *  trackBarH2;
	private: System::Windows::Forms::Label *  label7;
	private: System::Windows::Forms::TrackBar *  trackBarW2;
	private: System::Windows::Forms::Label *  label8;
	private: System::Windows::Forms::TrackBar *  trackBarY2;
	private: System::Windows::Forms::Label *  label9;
	private: System::Windows::Forms::TrackBar *  trackBarX2;
	private: System::Windows::Forms::Label *  label10;
	private: System::Windows::Forms::GroupBox *  groupBox3;
	private: System::Windows::Forms::Button *  buttonOpen;
	private: System::Windows::Forms::Button *  buttonPlay;
	private: System::Windows::Forms::Button *  buttonPause;
	private: System::Windows::Forms::Button *  buttonStop;
	private: System::Windows::Forms::Button *  buttonClose;


	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container * components;

		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->pictureBoxVMR9 = new System::Windows::Forms::PictureBox();
			this->trackBarX1 = new System::Windows::Forms::TrackBar();
			this->label1 = new System::Windows::Forms::Label();
			this->trackBarY1 = new System::Windows::Forms::TrackBar();
			this->label2 = new System::Windows::Forms::Label();
			this->trackBarW1 = new System::Windows::Forms::TrackBar();
			this->label3 = new System::Windows::Forms::Label();
			this->trackBarH1 = new System::Windows::Forms::TrackBar();
			this->label4 = new System::Windows::Forms::Label();
			this->trackBarA1 = new System::Windows::Forms::TrackBar();
			this->label5 = new System::Windows::Forms::Label();
			this->groupBox1 = new System::Windows::Forms::GroupBox();
			this->groupBox2 = new System::Windows::Forms::GroupBox();
			this->buttonStop = new System::Windows::Forms::Button();
			this->buttonClose = new System::Windows::Forms::Button();
			this->buttonPlay = new System::Windows::Forms::Button();
			this->buttonOpen = new System::Windows::Forms::Button();
			this->buttonPause = new System::Windows::Forms::Button();
			this->trackBarA2 = new System::Windows::Forms::TrackBar();
			this->label6 = new System::Windows::Forms::Label();
			this->trackBarH2 = new System::Windows::Forms::TrackBar();
			this->label7 = new System::Windows::Forms::Label();
			this->trackBarW2 = new System::Windows::Forms::TrackBar();
			this->label8 = new System::Windows::Forms::Label();
			this->trackBarY2 = new System::Windows::Forms::TrackBar();
			this->label9 = new System::Windows::Forms::Label();
			this->trackBarX2 = new System::Windows::Forms::TrackBar();
			this->label10 = new System::Windows::Forms::Label();
			this->groupBox3 = new System::Windows::Forms::GroupBox();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarX1))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarY1))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarW1))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarH1))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarA1))->BeginInit();
			this->groupBox2->SuspendLayout();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarA2))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarH2))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarW2))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarY2))->BeginInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarX2))->BeginInit();
			this->SuspendLayout();
			// 
			// pictureBoxVMR9
			// 
			this->pictureBoxVMR9->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
			this->pictureBoxVMR9->Location = System::Drawing::Point(168, 32);
			this->pictureBoxVMR9->Name = S"pictureBoxVMR9";
			this->pictureBoxVMR9->Size = System::Drawing::Size(352, 288);
			this->pictureBoxVMR9->TabIndex = 0;
			this->pictureBoxVMR9->TabStop = false;
			// 
			// trackBarX1
			// 
			this->trackBarX1->Enabled = false;
			this->trackBarX1->Location = System::Drawing::Point(32, 48);
			this->trackBarX1->Maximum = 100;
			this->trackBarX1->Name = S"trackBarX1";
			this->trackBarX1->TabIndex = 1;
			this->trackBarX1->TickFrequency = 10;
			this->trackBarX1->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarX1->Scroll += new System::EventHandler(this, trackBarX1_Scroll);
			// 
			// label1
			// 
			this->label1->Location = System::Drawing::Point(40, 32);
			this->label1->Name = S"label1";
			this->label1->Size = System::Drawing::Size(72, 23);
			this->label1->TabIndex = 2;
			this->label1->Text = S"X Position";
			// 
			// trackBarY1
			// 
			this->trackBarY1->Enabled = false;
			this->trackBarY1->Location = System::Drawing::Point(32, 112);
			this->trackBarY1->Maximum = 100;
			this->trackBarY1->Name = S"trackBarY1";
			this->trackBarY1->TabIndex = 3;
			this->trackBarY1->TickFrequency = 10;
			this->trackBarY1->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarY1->Scroll += new System::EventHandler(this, trackBarY1_Scroll);
			// 
			// label2
			// 
			this->label2->Location = System::Drawing::Point(40, 96);
			this->label2->Name = S"label2";
			this->label2->Size = System::Drawing::Size(72, 23);
			this->label2->TabIndex = 4;
			this->label2->Text = S"Y Position";
			// 
			// trackBarW1
			// 
			this->trackBarW1->Enabled = false;
			this->trackBarW1->Location = System::Drawing::Point(32, 176);
			this->trackBarW1->Maximum = 100;
			this->trackBarW1->Name = S"trackBarW1";
			this->trackBarW1->TabIndex = 5;
			this->trackBarW1->TickFrequency = 10;
			this->trackBarW1->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarW1->Value = 100;
			this->trackBarW1->Scroll += new System::EventHandler(this, trackBarW1_Scroll);
			// 
			// label3
			// 
			this->label3->Location = System::Drawing::Point(40, 160);
			this->label3->Name = S"label3";
			this->label3->Size = System::Drawing::Size(72, 23);
			this->label3->TabIndex = 6;
			this->label3->Text = S"Width";
			// 
			// trackBarH1
			// 
			this->trackBarH1->Enabled = false;
			this->trackBarH1->Location = System::Drawing::Point(32, 240);
			this->trackBarH1->Maximum = 100;
			this->trackBarH1->Name = S"trackBarH1";
			this->trackBarH1->TabIndex = 7;
			this->trackBarH1->TickFrequency = 10;
			this->trackBarH1->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarH1->Value = 100;
			this->trackBarH1->Scroll += new System::EventHandler(this, trackBarH1_Scroll);
			// 
			// label4
			// 
			this->label4->Location = System::Drawing::Point(40, 224);
			this->label4->Name = S"label4";
			this->label4->Size = System::Drawing::Size(72, 23);
			this->label4->TabIndex = 8;
			this->label4->Text = S"Height";
			// 
			// trackBarA1
			// 
			this->trackBarA1->Enabled = false;
			this->trackBarA1->Location = System::Drawing::Point(32, 304);
			this->trackBarA1->Maximum = 100;
			this->trackBarA1->Name = S"trackBarA1";
			this->trackBarA1->TabIndex = 9;
			this->trackBarA1->TickFrequency = 10;
			this->trackBarA1->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarA1->Value = 100;
			this->trackBarA1->Scroll += new System::EventHandler(this, trackBarA1_Scroll);
			// 
			// label5
			// 
			this->label5->Location = System::Drawing::Point(40, 288);
			this->label5->Name = S"label5";
			this->label5->Size = System::Drawing::Size(72, 23);
			this->label5->TabIndex = 10;
			this->label5->Text = S"Alpha";
			// 
			// groupBox1
			// 
			this->groupBox1->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->groupBox1->Location = System::Drawing::Point(16, 8);
			this->groupBox1->Name = S"groupBox1";
			this->groupBox1->Size = System::Drawing::Size(128, 352);
			this->groupBox1->TabIndex = 11;
			this->groupBox1->TabStop = false;
			this->groupBox1->Text = S"Video Stream 1";
			// 
			// groupBox2
			// 
			this->groupBox2->Controls->Add(this->buttonStop);
			this->groupBox2->Controls->Add(this->buttonClose);
			this->groupBox2->Controls->Add(this->buttonPlay);
			this->groupBox2->Controls->Add(this->buttonOpen);
			this->groupBox2->Controls->Add(this->buttonPause);
			this->groupBox2->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->groupBox2->Location = System::Drawing::Point(152, 8);
			this->groupBox2->Name = S"groupBox2";
			this->groupBox2->Size = System::Drawing::Size(384, 352);
			this->groupBox2->TabIndex = 12;
			this->groupBox2->TabStop = false;
			this->groupBox2->Text = S"Video Mixing Renderer 9";
			// 
			// buttonStop
			// 
			this->buttonStop->Enabled = false;
			this->buttonStop->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->buttonStop->Location = System::Drawing::Point(216, 320);
			this->buttonStop->Name = S"buttonStop";
			this->buttonStop->Size = System::Drawing::Size(48, 23);
			this->buttonStop->TabIndex = 25;
			this->buttonStop->Text = S"Stop";
			this->buttonStop->Click += new System::EventHandler(this, buttonStop_Click);
			// 
			// buttonClose
			// 
			this->buttonClose->Enabled = false;
			this->buttonClose->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->buttonClose->Location = System::Drawing::Point(280, 320);
			this->buttonClose->Name = S"buttonClose";
			this->buttonClose->Size = System::Drawing::Size(48, 23);
			this->buttonClose->TabIndex = 26;
			this->buttonClose->Text = S"Close";
			this->buttonClose->Click += new System::EventHandler(this, buttonClose_Click);
			// 
			// buttonPlay
			// 
			this->buttonPlay->Enabled = false;
			this->buttonPlay->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->buttonPlay->Location = System::Drawing::Point(152, 320);
			this->buttonPlay->Name = S"buttonPlay";
			this->buttonPlay->Size = System::Drawing::Size(48, 23);
			this->buttonPlay->TabIndex = 1;
			this->buttonPlay->Text = S"Play";
			this->buttonPlay->Click += new System::EventHandler(this, buttonPlay_Click);
			// 
			// buttonOpen
			// 
			this->buttonOpen->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->buttonOpen->Location = System::Drawing::Point(48, 320);
			this->buttonOpen->Name = S"buttonOpen";
			this->buttonOpen->Size = System::Drawing::Size(88, 24);
			this->buttonOpen->TabIndex = 0;
			this->buttonOpen->Text = S"Open Streams";
			this->buttonOpen->Click += new System::EventHandler(this, buttonOpen_Click);
			// 
			// buttonPause
			// 
			this->buttonPause->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->buttonPause->Location = System::Drawing::Point(152, 320);
			this->buttonPause->Name = S"buttonPause";
			this->buttonPause->Size = System::Drawing::Size(48, 23);
			this->buttonPause->TabIndex = 24;
			this->buttonPause->Text = S"Pause";
			this->buttonPause->Click += new System::EventHandler(this, buttonPause_Click);
			// 
			// trackBarA2
			// 
			this->trackBarA2->Enabled = false;
			this->trackBarA2->Location = System::Drawing::Point(560, 304);
			this->trackBarA2->Maximum = 100;
			this->trackBarA2->Name = S"trackBarA2";
			this->trackBarA2->TabIndex = 21;
			this->trackBarA2->TickFrequency = 10;
			this->trackBarA2->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarA2->Value = 50;
			this->trackBarA2->Scroll += new System::EventHandler(this, trackBarA2_Scroll);
			// 
			// label6
			// 
			this->label6->Location = System::Drawing::Point(568, 288);
			this->label6->Name = S"label6";
			this->label6->Size = System::Drawing::Size(72, 23);
			this->label6->TabIndex = 22;
			this->label6->Text = S"Alpha";
			// 
			// trackBarH2
			// 
			this->trackBarH2->Enabled = false;
			this->trackBarH2->Location = System::Drawing::Point(560, 240);
			this->trackBarH2->Maximum = 100;
			this->trackBarH2->Name = S"trackBarH2";
			this->trackBarH2->TabIndex = 19;
			this->trackBarH2->TickFrequency = 10;
			this->trackBarH2->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarH2->Value = 100;
			this->trackBarH2->Scroll += new System::EventHandler(this, trackBarH2_Scroll);
			// 
			// label7
			// 
			this->label7->Location = System::Drawing::Point(568, 224);
			this->label7->Name = S"label7";
			this->label7->Size = System::Drawing::Size(72, 23);
			this->label7->TabIndex = 20;
			this->label7->Text = S"Height";
			// 
			// trackBarW2
			// 
			this->trackBarW2->Enabled = false;
			this->trackBarW2->Location = System::Drawing::Point(560, 176);
			this->trackBarW2->Maximum = 100;
			this->trackBarW2->Name = S"trackBarW2";
			this->trackBarW2->TabIndex = 17;
			this->trackBarW2->TickFrequency = 10;
			this->trackBarW2->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarW2->Value = 100;
			this->trackBarW2->Scroll += new System::EventHandler(this, trackBarW2_Scroll);
			// 
			// label8
			// 
			this->label8->Location = System::Drawing::Point(568, 160);
			this->label8->Name = S"label8";
			this->label8->Size = System::Drawing::Size(72, 23);
			this->label8->TabIndex = 18;
			this->label8->Text = S"Width";
			// 
			// trackBarY2
			// 
			this->trackBarY2->Enabled = false;
			this->trackBarY2->Location = System::Drawing::Point(560, 112);
			this->trackBarY2->Maximum = 100;
			this->trackBarY2->Name = S"trackBarY2";
			this->trackBarY2->TabIndex = 15;
			this->trackBarY2->TickFrequency = 10;
			this->trackBarY2->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarY2->Scroll += new System::EventHandler(this, trackBarY2_Scroll);
			// 
			// label9
			// 
			this->label9->Location = System::Drawing::Point(568, 96);
			this->label9->Name = S"label9";
			this->label9->Size = System::Drawing::Size(72, 23);
			this->label9->TabIndex = 16;
			this->label9->Text = S"Y Position";
			// 
			// trackBarX2
			// 
			this->trackBarX2->Enabled = false;
			this->trackBarX2->Location = System::Drawing::Point(560, 48);
			this->trackBarX2->Maximum = 100;
			this->trackBarX2->Name = S"trackBarX2";
			this->trackBarX2->TabIndex = 13;
			this->trackBarX2->TickFrequency = 10;
			this->trackBarX2->TickStyle = System::Windows::Forms::TickStyle::Both;
			this->trackBarX2->Scroll += new System::EventHandler(this, trackBarX2_Scroll);
			// 
			// label10
			// 
			this->label10->Location = System::Drawing::Point(568, 32);
			this->label10->Name = S"label10";
			this->label10->Size = System::Drawing::Size(72, 23);
			this->label10->TabIndex = 14;
			this->label10->Text = S"X Position";
			// 
			// groupBox3
			// 
			this->groupBox3->Font = new System::Drawing::Font(S"Microsoft Sans Serif", 8.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point, (System::Byte)0);
			this->groupBox3->Location = System::Drawing::Point(544, 8);
			this->groupBox3->Name = S"groupBox3";
			this->groupBox3->Size = System::Drawing::Size(128, 352);
			this->groupBox3->TabIndex = 23;
			this->groupBox3->TabStop = false;
			this->groupBox3->Text = S"Video Stream 2";
			// 
			// Form1
			// 
			this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
			this->ClientSize = System::Drawing::Size(686, 375);
			this->Controls->Add(this->trackBarA2);
			this->Controls->Add(this->label6);
			this->Controls->Add(this->trackBarH2);
			this->Controls->Add(this->label7);
			this->Controls->Add(this->trackBarW2);
			this->Controls->Add(this->label8);
			this->Controls->Add(this->trackBarY2);
			this->Controls->Add(this->label9);
			this->Controls->Add(this->trackBarX2);
			this->Controls->Add(this->label10);
			this->Controls->Add(this->groupBox3);
			this->Controls->Add(this->trackBarA1);
			this->Controls->Add(this->label5);
			this->Controls->Add(this->trackBarH1);
			this->Controls->Add(this->label4);
			this->Controls->Add(this->trackBarW1);
			this->Controls->Add(this->label3);
			this->Controls->Add(this->trackBarY1);
			this->Controls->Add(this->label2);
			this->Controls->Add(this->trackBarX1);
			this->Controls->Add(this->label1);
			this->Controls->Add(this->groupBox1);
			this->Controls->Add(this->pictureBoxVMR9);
			this->Controls->Add(this->groupBox2);
			this->FormBorderStyle = System::Windows::Forms::FormBorderStyle::FixedDialog;
			this->MaximizeBox = false;
			this->Name = S"Form1";
			this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
			this->Text = S"DirectShow - Video Mixing Renderer 9";
			this->Load += new System::EventHandler(this, Form1_Load);
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarX1))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarY1))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarW1))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarH1))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarA1))->EndInit();
			this->groupBox2->ResumeLayout(false);
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarA2))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarH2))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarW2))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarY2))->EndInit();
			(__try_cast<System::ComponentModel::ISupportInitialize *  >(this->trackBarX2))->EndInit();
			this->ResumeLayout(false);

		}	

		__nogc class myVMR9
		{
            // Encapsulate VMR9 functionality in this class
			VMR9NormalizedRect *r;
			IVMRWindowlessControl9 *pWC;
			IVMRMixerControl9 *pMix;
			IGraphBuilder *pGB;
			IBaseFilter *pVmr;
			IVMRFilterConfig9 *pConfig;
			IMediaControl *pMC;
			IMediaSeeking *pMS;

		public: myVMR9(System::Drawing::Rectangle rect, HWND hwnd)
			{
                /*
				constructor receives PictureBox's coordinates
                along with its handler
			    */

				// initialize video coordinates with normal values
				r = new VMR9NormalizedRect;
				r->left = 0;
				r->top = 0;
				r->right = 1;
				r->bottom = 1;

				pWC = NULL;
				pMix = NULL;
				pGB = NULL;
				pVmr = NULL;
				pConfig = NULL;
				pMC = NULL;
				pMS = NULL;

				// create an instance of the Filter Graph Manager
				CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, 
                IID_IGraphBuilder, (void **)&pGB);
				
				// create an instance of the VMR9 filter
				CoCreateInstance(CLSID_VideoMixingRenderer9, NULL, CLSCTX_INPROC,
				IID_IBaseFilter, (void**)&pVmr);

				// add the VMR9 filter to the Graph Manager
				pGB->AddFilter(pVmr, L"Video");

				// get a pointer to the IVMRFilterConfig9 interface 
				pVmr->QueryInterface(IID_IVMRFilterConfig9, (void**)&pConfig);
				// make sure VMR9 is in windowless mode
				pConfig->SetRenderingMode(VMR9Mode_Windowless);

				// get a pointer to the IVMRWindowlessControl9 interface 
				pVmr->QueryInterface(IID_IVMRWindowlessControl9, (void**)&pWC);

				// explicitly convert System::Drawing::Rectangle type to RECT type
				RECT rcDest = {0};
				rcDest.bottom =  rect.Bottom;
				rcDest.left = rect.Left;
				rcDest.right = rect.Right;
				rcDest.top = rect.Top;

				// set destination rectangle for the video
				pWC->SetVideoPosition(NULL, &rcDest);
				// specify the container window that the video should be clipped to
				pWC->SetVideoClippingWindow(hwnd);

				// IVMRMixerControl manipulates video streams
				pVmr->QueryInterface(IID_IVMRMixerControl9, (void**)&pMix);
                // IMediaSeeking seeks to a position in the video stream
				pGB->QueryInterface(IID_IMediaSeeking, (void **)&pMS);
				// IMediaControl controls flow of data through the graph
				pGB->QueryInterface(IID_IMediaControl, (void **)&pMC);
			}

			HRESULT play()
			{
				pMC->Run();
				return S_OK;
			}

			HRESULT pause()
			{
				pMC->Pause();
				return S_OK;
			}

			HRESULT stop()
			{
				LONGLONG pos = 0;
				pMC->Stop();
				pMS->SetPositions(&pos, AM_SEEKING_AbsolutePositioning, NULL, AM_SEEKING_NoPositioning);
				pMC->Pause();
				return S_OK;
			}

			HRESULT close()
			{
				SAFE_RELEASE(pWC);
				SAFE_RELEASE(pMix);
				SAFE_RELEASE(pGB);
				SAFE_RELEASE(pVmr);
				SAFE_RELEASE(pConfig);
				SAFE_RELEASE(pMC);
				SAFE_RELEASE(pMS);
				return S_OK;
			}

			HRESULT setAlpha(DWORD stream, float alpha)
			{
				pMix->SetAlpha(stream, alpha);
				return S_OK;
			}

			HRESULT setX(DWORD stream, float x)
			{
				// video displacement along x-axis
				r->right = x + (r->right - r->left);
				r->left = x;
				pMix->SetOutputRect(stream, r);
				return S_OK;
			}

			HRESULT setY(DWORD stream, float y)
			{
				// video displacement along y-axis
				r->bottom = y + (r->bottom - r->top);
				r->top = y;
				pMix->SetOutputRect(stream, r);
				return S_OK;
			}

			HRESULT setW(DWORD stream, float w)
			{
				// video stretching/shrinking along x-axis
				r->right = r->left + w;
				pMix->SetOutputRect(stream, r);
				return S_OK;
			}

			HRESULT setH(DWORD stream, float h)
			{
				// video stretching/shrinking along y-axis
				r->bottom = r->top + h;
				pMix->SetOutputRect(stream, r);
				return S_OK;
			}

			HRESULT renderFiles(String* file1, String* file2)
			{
				// convert String type to LPCSTR type and render the videos

				LPCTSTR lFile;
				lFile = static_cast<LPCTSTR>(const_cast<void*>(static_cast<const void*>(System::Runtime::InteropServices::Marshal::StringToHGlobalAuto(file1))));
				pGB->RenderFile((LPCWSTR)lFile, NULL);

				lFile = static_cast<LPCTSTR>(const_cast<void*>(static_cast<const void*>(System::Runtime::InteropServices::Marshal::StringToHGlobalAuto(file2))));
				pGB->RenderFile((LPCWSTR)lFile, NULL);
				
				System::Runtime::InteropServices::Marshal::FreeHGlobal(static_cast<IntPtr>(const_cast<void*>(static_cast<const void*>(lFile))));

				pMC->StopWhenReady();
				return S_OK;
			}
		};

		myVMR9 *myVmr;

	private: void initialize(void)
				{
                    HWND hwnd = (HWND)pictureBoxVMR9->get_Handle().ToPointer();
                    myVmr = new myVMR9(pictureBoxVMR9->get_ClientRectangle(), hwnd);
                    myVmr->setAlpha(0, (float)trackBarA1->Value/100);
                    myVmr->setAlpha(1, (float)trackBarA2->Value/100);
                    trackBarX1->Minimum = -100;
					trackBarY1->Minimum = -100;
					trackBarW1->Minimum = -100;
					trackBarH1->Minimum = -100;
					trackBarX2->Minimum = -100;
					trackBarY2->Minimum = -100;
					trackBarW2->Minimum = -100;
					trackBarH2->Minimum = -100;
					trackBarX1->Value = 0;
					trackBarY1->Value = 0;
					trackBarW1->Value = 100;
					trackBarH1->Value = 100;
					trackBarA1->Value = 100;
					trackBarX2->Value = 0;
					trackBarY2->Value = 0;
					trackBarW2->Value = 100;
					trackBarH2->Value = 100;
					trackBarA2->Value = 50;
				}

	private: System::Void Form1_Load(System::Object *  sender, System::EventArgs *  e)
			 {
				 initialize();
			 }

	private: System::Void buttonOpen_Click(System::Object *  sender, System::EventArgs *  e)
			 {
				 String *file1, *file2;
			     String* filterText = "Video Files (*.mpg; *.mpeg; *.m1v; *.avi)|*.mpg; *.mpeg; *.m1v; *.avi;| All Files (*.*)|*.*";
                 OpenFileDialog *ofd = new OpenFileDialog();
                 ofd->Filter = filterText;
                 ofd->Title = "Open Video File";
				 MessageBox::Show("Select first video");
				 ofd->ShowDialog();
				 file1 = ofd->FileName;
				 if ((file1 == NULL) || (file1 == String::Empty))
                     return;

				 ofd->FileName = NULL;
				 MessageBox::Show("Select second video");

				 ofd->ShowDialog();
				 file2 = ofd->FileName;
				 if ((file2 == NULL) || (file2 == String::Empty))
                     return;

                 myVmr->renderFiles(file1, file2);

                 buttonOpen->Enabled = false;
				 buttonPlay->Enabled = true;
				 buttonStop->Enabled = true;
                 buttonClose->Enabled = true;
				 trackBarA1->Enabled = true;
				 trackBarX1->Enabled = true;
				 trackBarY1->Enabled = true;
				 trackBarW1->Enabled = true;
				 trackBarH1->Enabled = true;
				 trackBarA2->Enabled = true;
				 trackBarX2->Enabled = true;
				 trackBarY2->Enabled = true;
				 trackBarW2->Enabled = true;
				 trackBarH2->Enabled = true;
			 }

private: System::Void buttonPlay_Click(System::Object *  sender, System::EventArgs *  e)
		 {
			 myVmr->play();
			 buttonPlay->Hide();
		 }

private: System::Void buttonPause_Click(System::Object *  sender, System::EventArgs *  e)
		 {
			 myVmr->pause();
			 buttonPlay->Show();
		 }

private: System::Void buttonStop_Click(System::Object *  sender, System::EventArgs *  e)
		 {
			 myVmr->stop();
			 buttonPlay->Show();
		 }

private: System::Void buttonClose_Click(System::Object *  sender, System::EventArgs *  e)
		 {
			 myVmr->close();
			 initialize();
			 buttonClose->Enabled = false;
			 buttonPlay->Show();
			 buttonStop->Show();
			 buttonPlay->Enabled = false;
			 buttonStop->Enabled = false;
			 buttonOpen->Enabled = true;
             trackBarA1->Enabled = false;
			 trackBarX1->Enabled = false;
			 trackBarY1->Enabled = false;
			 trackBarW1->Enabled = false;
			 trackBarH1->Enabled = false;
			 trackBarA2->Enabled = false;
			 trackBarX2->Enabled = false;
			 trackBarY2->Enabled = false;
			 trackBarW2->Enabled = false;
			 trackBarH2->Enabled = false;
		 }

private: System::Void trackBarX1_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setX(0, (float)trackBarX1->Value/100);
		 }

private: System::Void trackBarY1_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setY(0, (float)trackBarY1->Value/100);
		 }

private: System::Void trackBarW1_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setW(0, (float)trackBarW1->Value/100);
		 }

private: System::Void trackBarH1_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setH(0, (float)trackBarH1->Value/100);
		 }

private: System::Void trackBarA1_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setAlpha(0, (float)trackBarA1->Value/100);
		 }

private: System::Void trackBarX2_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setX(1, (float)trackBarX2->Value/100);
		 }

private: System::Void trackBarY2_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setY(1, (float)trackBarY2->Value/100);
		 }

private: System::Void trackBarW2_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setW(1, (float)trackBarW2->Value/100);
		 }

private: System::Void trackBarH2_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setH(1, (float)trackBarH2->Value/100);
		 }

private: System::Void trackBarA2_Scroll(System::Object *  sender, System::EventArgs *  e)
		 {
             myVmr->setAlpha(1, (float)trackBarA2->Value/100);
		 }

};
}