Enable floating SIP control in IPAQ/Windows CE .NET

//***********************************************************
//	         SIP Style Control Sample Application      	   //
//                                                         //
//                     Author : C. Chris                   //
//				  http://www.PassportONE.com			   //
//		         Email:  chris@PassportONE.com			   //
//                       � Sept 2002                       //
//                                                         //
//***********************************************************

#include "SipStyle.h"

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
	//  PURPOSE:  
	//		Main application message dispatch routing.
	//		Check for previous instance.
	//  PARAMETERS:
	//		- HINSTANCE
	//		- hPreviousInstance
	//		- pCmdLine
	//		- nCmdShow
	//  OPERATION:
	//		- Dispatch the received windows message
	//  RETURN VALUE:
	//      0/1

	MSG msg;

	// Backup the application instance value
	hInst = hInstance;

	// Create the main dialouge
	hWndMain = CreateDialog(hInstance, MAKEINTRESOURCE(IDD_DIALOG1), NULL, (DLGPROC)DlgProc);
	if (!hWndMain)
	{
		// Ensure the dialouge is created
		MessageBox(NULL, TEXT("Could not create dialogue."), TEXT("Error"), MB_OK);
		// Set the return value
		return FALSE;
	}
	else
		// Display the dialouge
		ShowWindow(hWndMain, SW_SHOW);

	// Main message loop:
	while (GetMessage(&msg, 0, 0, 0)) 
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}

	return msg.wParam;
}

LRESULT CALLBACK DlgProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	//  PURPOSE:  
	//		- Main dialouge CALLBACK procedure.
	//  PARAMETERS:
	//		- HWND
	//		- message
	//		- wParam
	//		- lParam
	//  OPERATION:
	//		- Any dialouge related function/application functioncalling.
	//  RETURN VALUE:
	//      0/1


	switch (message) 
	{
		case WM_COMMAND:
			switch (LOWORD(wParam))
			{
				case IDOK:
				case IDCANCEL:
				   DestroyWindow(hWnd);
				   break;
				case IDC_BUTTON1:
					// Hide the SIP control title-bar
					SaveDWORD(HKEY_CURRENT_USER, TEXT("ControlPanel\\Sip"), TEXT("DragStyle"), 1);
					// Soft reset the device
					KernelIoControl(IOCTL_HAL_REBOOT, NULL, 0, NULL, 0, NULL);
					break;
				case IDC_BUTTON2:
					// Show the SIP control title-bar
					SaveDWORD(HKEY_CURRENT_USER, TEXT("ControlPanel\\Sip"), TEXT("DragStyle"), 0);
					// Soft reset the device
					KernelIoControl(IOCTL_HAL_REBOOT, NULL, 0, NULL, 0, NULL);
					break;
				case IDC_BUTTON3:
					// Show the SIP control
					SipShowIM(SIPF_ON);
					break;
				case IDC_BUTTON4:
					// Hide the SIP control
					SipShowIM(SIPF_OFF);
					break;

			}
			break;
		case WM_CLOSE:
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
   }
   return 0;
}