C / C++ / MFC Discussion Boards

Niklas L28-Jun-10 2:14

28-Jun-10 2:14

In your constructor the underlying window has not yet been created, and that's why the call fails. Put it in your OnInitDialog handler instead.

home

Re: FullScrean listbox

aangerma28-Jun-10 19:42

aangerma

28-Jun-10 19:42

Thank you it's work wall!

Re: FullScrean listbox

Member 419459328-Jun-10 7:03

Member 4194593

28-Jun-10 7:03

For some reason I read the mis-spelling as FillScreaM, and I thought the OP wanted something to get immediate attention!

Dislplaying bitmap image on the screen when raw bitmap data is available in memory? (WIN32)

yeswekey27-Jun-10 21:26

yeswekey

27-Jun-10 21:26

Including the bmp image as resource isn't secure (as anyone can tamper easily).

So, I form the raw bitmap data (excluding headers) at runtime using some obfuscated code. The image is 208 pixels wide and has a height of 97 pixels. It takes 24bits per pixel. I'm very weak in GDI. I got a code to display image from resource and I tried modifying. Unfortunately, it didn't work Frown | :(

I'm MFC free till now and would like to remain so Big Grin | :-D

Plz let me know the right approach.

Here is what I tried:

/* ************* Some Globals:********************* */
	HBITMAP bmpExercising;
	BITMAP bitmap;

/* ************* After Calls to CreateWindow ********************* */
	bmpExercising = CreateCompatibleBitmap(GetDC(myWind), 208, 97);
	GetObject(bmpExercising, sizeof(bitmap), &bitmap);

	bitmap.bmBits = buf;
	bitmap.bmBitsPixel = 24;
	bitmap.bmHeight = 97;
	bitmap.bmWidth = 208;
	bitmap.bmPlanes = 1;

/* Declared variables in WindProc */
HDC hDC, MemDCExercising;
PAINTSTRUCT Ps;

/* ************* in WM_PAINT: ********************* */
case WM_PAINT:
	hDC = BeginPaint(hwnd, &Ps);
	MemDCExercising = CreateCompatibleDC(hDC);
	SelectObject(MemDCExercising, bmpExercising);
	BitBlt(hDC, 10, 10, 208, 97, MemDCExercising, 0, 0, SRCCOPY);
	DeleteDC(MemDCExercising);
	DeleteObject(bmpExercising);
	EndPaint(hwnd, &Ps);
	break;

I want to do it without MFC

I'm using Visual C++ 2005 Professional. Windows XP Professional with SP3.

-
S.V.Kaushik

Re: Dislplaying bitmap image on the screen when raw bitmap data is available in memory? (WIN32)

Niklas L27-Jun-10 21:41

Niklas L

27-Jun-10 21:41

There are a number of errors, I will list a few.

Selecting a GDI object into your device context needs to be followed by the same object being selected out of the dc. In your case

HGDIOBJ oldbmp = ::SelectObject(dc, bmp);
// Do some blitting
::SelectObject(dc, oldbmp);
DeleteDC(dc);

Your paint code will only have a bitmap the first time it paints, since you delete the bitmap there. Delete your bitmap in WM_DESTROY handler instead.

Also:
Your blitting area is 10x10 less than your bitmap.

home

Re: Dislplaying bitmap image on the screen when raw bitmap data is available in memory? (WIN32)

yeswekey27-Jun-10 21:57

yeswekey

27-Jun-10 21:57

thanx for the info... will do the changes and post the result Smile | :)

-
S.V.Kaushik

Re: Dislplaying bitmap image on the screen when raw bitmap data is available in memory? (WIN32)

KarstenK27-Jun-10 21:49

KarstenK

27-Jun-10 21:49

look in the source of that great article.
CBitmapEx - Free C++ Bitmap Manipulation Class[^]

You can debug in the MFC code to view some details.

/* ************* After Calls to CreateWindow ********************* */
bmpExercising = CreateCompatibleBitmap(GetDC(myWind), 208, 97);
GetObject(bmpExercising, sizeof(bitmap), &bitmap);

//you cant modify this data in that way.
/*bitmap.bmBits = buf;
bitmap.bmBitsPixel = 24;
bitmap.bmHeight = 97;
bitmap.bmWidth = 208;
bitmap.bmPlanes = 1;*/

//use ::SetPixel() - API for every pixel one time

Press F1 for help or google it.
Greetings from Germany

Re: Dislplaying bitmap image on the screen when raw bitmap data is available in memory? (WIN32)

yeswekey27-Jun-10 23:04

yeswekey

27-Jun-10 23:04

Thanks a lot... This is exactly what i needed Smile | :)

-
S.V.Kaushik

Round Button

john563227-Jun-10 21:25

john5632

27-Jun-10 21:25

Hi,

I am creating a ownder draw button with Round Edges. I tried the bolw code for round edged in OnDraw()

//make round corner
CRgn rgn;
CRect crt;
GetClientRect(&crt);
rgn.CreateRoundRectRgn( crt.left, crt.top, crt.right, crt.bottom, 13, 13);
SetWindowRgn(rgn,1);

Button is coming with round edges but If button repaints it is becoming rectanglular shape button.
What shall I do?

Re: Round Button

Software_Developer27-Jun-10 22:16

Software_Developer

27-Jun-10 22:16

Below is a link to Chris Maunder's class that turns rectangular buttons into round buttons.

Round Buttons[^]

Re: Round Button

Mohan Ramachandra27-Jun-10 22:27

Mohan Ramachandra

27-Jun-10 22:27

john5632 wrote:
Button is coming with round edges but If button repaints it is becoming rectanglular shape button.
What shall I do?

I think your drawing the whole rectangular area of the button in OnDraw function.

Draw only the round rectangular area of the button.
OR
Draw the button with the dialog background first and then draw the remaining things.

Exception

T.RATHA KRISHNAN27-Jun-10 21:20

T.RATHA KRISHNAN

27-Jun-10 21:20

Hi!
I've already asked this question in this forum with the heading "Data Execution Prevention".
Please refer the following link:

How do I check whether I've corrupted the buffer?
I've deleted all the variable I've used.

Please tell me how to get around this error?

Here is my code:

#include "irrlicht.h"
#include "CEGUI.h"
#include "CEGUIIrrlichtRenderer.h"

#define STATUS_ACCESS_VIOLATION ((NTSTATUS)0xC0000005L)

using namespace std;
using namespace CEGUI;
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

IrrlichtDevice* device = createDevice(EDT_DIRECT3D9, core::dimension2d<u32>(800, 600), 16, false);
CEGUI::IrrlichtRenderer &myRenderer = CEGUI::IrrlichtRenderer::bootstrapSystem(*device);
//video::IVideoDriver* driver = device->getVideoDriver();
//ISceneManager* smgr = device->getSceneManager();

class InitialMenu : public IEventReceiver
{
 private:
	     WindowManager* wmgr;
		 Window* myRoot, *playWnd, *optionsWnd, *creditsWnd, *initialMnuBG_img, *playMnuBG_img, *optionsMnuBG_img, *creditsMnuBG_img;
		 FrameWindow* fWnd; 
		 DefaultResourceProvider* rp;
		 CEGUI::PushButton* play_btn, *options_btn, *credits_btn, *exit_btn;
		 CEGUI::Image* playercty_img, *oppcty_img;
		 CEGUI::Combobox* playercty_cbo, *oppcty_cbo;
		 CEGUI::PushButton* playMnuBack_btn, *playMnuNext_btn, *optionsMnuBack_btn, *optionsMnuNext_btn;
		 CEGUI::PushButton* creditsMnuBack_btn;
		 CEGUI::Scrollbar*  music_scr, *sound_scr;
		 //CEGUI::Image* initialMnuBG_img, *playMnuBG_img, *optionsMnuBG_img, *creditsMnuBG_img;
 public:
	   InitialMenu()
	   {  
	    rp = static_cast<DefaultResourceProvider*>(System::getSingleton().getResourceProvider());
		rp->setResourceGroupDirectory ("schemes", "datafiles/schemes/"); 
        rp->setResourceGroupDirectory ("imagesets", "datafiles/imagesets/"); 
        rp->setResourceGroupDirectory ("fonts", "datafiles/fonts/"); 
        rp->setResourceGroupDirectory ("layouts", "datafiles/layouts/"); 
        rp->setResourceGroupDirectory ("looknfeel", "datafiles/looknfeel/"); 
        rp->setResourceGroupDirectory ("lua_scripts", "../datafiles/lua_scripts/"); 
		CEGUI::Imageset::setDefaultResourceGroup("imagesets");
        CEGUI::Font::setDefaultResourceGroup("fonts");
        CEGUI::Scheme::setDefaultResourceGroup("schemes");
        CEGUI::WidgetLookManager::setDefaultResourceGroup("looknfeel");
        CEGUI::WindowManager::setDefaultResourceGroup("layouts");
        CEGUI::SchemeManager::getSingleton().create("TaharezLook.scheme","schemes");
        FontManager::getSingleton().createFreeTypeFont("DejaVuSans-10.font",10,false, "DejaVuSans.ttf"); 
        WidgetLookManager::getSingleton().parseLookNFeelSpecification("TaharezLook.looknfeel", "looknfeel");
        wmgr = WindowManager::getSingletonPtr();
		wmgr->loadWindowLayout("E://CricCEGUI//datafiles//layouts//VanillaWindows.layout", "", "", 0, 0);
		myRoot = wmgr->createWindow("DefaultWindow", "root");
		System::getSingleton().setGUISheet(myRoot);
		fWnd = (FrameWindow*)wmgr->createWindow("TaharezLook/FrameWindow", "");
        fWnd->setPosition(UVector2(UDim(0.25f, 0.0f), UDim(0.25f, 0.0f)));
        fWnd->setSize(UVector2(UDim(0.5f, 0.5f), UDim(0.5f, 0.5f)));
        fWnd->setText("Hello World!");
        myRoot->addChildWindow(fWnd);
		fWnd->setSizingEnabled(true);
		CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::LeftButton);
		CEGUI::System::getSingleton().injectMouseButtonUp(CEGUI::LeftButton);
        play_btn = (PushButton*) wmgr->createWindow("TaharezLook/Button", "play_btn");
        options_btn = (PushButton*) wmgr->createWindow("TaharezLook/Button", "options_btn");
        credits_btn = (PushButton*) wmgr->createWindow("TaharezLook/Button", "credits_btn");
        exit_btn = (PushButton*) wmgr->createWindow("TaharezLook/Button", "exit_btn");
		ImagesetManager::getSingleton().createFromImageFile("initialMnuBG_img", "E:\\CricCEGUI\\bg.png", " ");
		initialMnuBG_img = wmgr->createWindow("TaharezLook/StaticImage", "initialMnuBG_img");
		initialMnuBG_img->setArea(URect (cegui_reldim (0), cegui_reldim (0), cegui_reldim (1), cegui_reldim (1)));
		initialMnuBG_img->setProperty("FrameEnabled", "false");
		initialMnuBG_img->setProperty("BackgroundEnabled", "false");
		initialMnuBG_img->setProperty("Image", "set:initialMnuBG_img image:full_image");		
		fWnd->addChildWindow(initialMnuBG_img);
        fWnd->addChildWindow(play_btn);
        fWnd->addChildWindow(options_btn);
        fWnd->addChildWindow(credits_btn);
        fWnd->addChildWindow(exit_btn);
        play_btn->setPosition(UVector2(UDim(0.22f, 11.5f), UDim(0.05f, 11.5f)));
        play_btn->setSize(UVector2(UDim(0.2f, 0.15f), UDim(0.15f, 0.15f)));
		play_btn->setText("Play");
		play_btn->setProperty("NormalImage", "E:/CricCEGUI/bg.png");
        options_btn->setPosition(UVector2(UDim(0.25f, 0.25f), UDim(0.25f, 0.25f)));
        options_btn->setSize(UVector2(UDim(0.2f, 0.15f), UDim(0.15f, 0.15f)));
		options_btn->setText("Options");
        credits_btn->setPosition(UVector2(UDim(0.18f, 28.6f), UDim(0.3f, 28.6f)));
		credits_btn->setText("Credits");
        credits_btn->setSize(UVector2(UDim(0.2f, 0.15f), UDim(0.15f, 0.15f)));
        exit_btn->setPosition(UVector2(UDim(0.07f, 71.2f), UDim(0.3f, 71.2f)));
        exit_btn->setSize(UVector2(UDim(0.2f, 0.15f), UDim(0.15f, 0.15f)));
		exit_btn->setText("Exit");
        System::getSingleton().setDefaultFont("DejaVuSans-10.font");
        System::getSingleton().setDefaultTooltip("TaharezLook/Tooltip");         
		CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::LeftButton);
		CEGUI::System::getSingleton().injectMouseButtonUp(CEGUI::LeftButton);
		//CEGUI::System::setMouseClickEventGenerationEnabled(true);
		play_btn->subscribeEvent(PushButton::EventClicked, Event::Subscriber(&InitialMenu::playHandler, this));
		//CEGUI::Event::Subscriber(&InitialMenu::playHandler, this);
		//play_btn->subscribeEvent(PushButton::EventMouseEnters,  Event::Subscriber(&InitialMenu::onMouseEnters, this));
	    options_btn->subscribeEvent(PushButton::EventClicked, Event::Subscriber(&InitialMenu::optionsHandler, this));
	    credits_btn->subscribeEvent(PushButton::EventClicked, Event::Subscriber(&InitialMenu::creditsHandler, this));
	    exit_btn->subscribeEvent(PushButton::EventClicked, Event::Subscriber(&InitialMenu::exitHandler, this));
	   }

	   bool playHandler(const EventArgs& e)
	   {
		//CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::LeftButton);
		//CEGUI::System::getSingleton().injectMouseButtonUp(CEGUI::LeftButton);
		wmgr = WindowManager::getSingletonPtr();
		
		playWnd = (FrameWindow*)wmgr->createWindow("TaharezLook/FrameWindow", "playWnd");
        playWnd->setPosition(UVector2(UDim(0.25f, 0.0f), UDim(0.25f, 0.0f)));
        playWnd->setSize(UVector2(UDim(0.5f, 0.5f), UDim(0.5f, 0.5f)));

		System::getSingleton().setGUISheet(playWnd);

		playercty_img = (Image*) wmgr->createWindow("TaharezLook/StaticImage", "playercty_img");
		oppcty_img = (Image*) wmgr->createWindow("TaharezLook/StaticImage", "oppcty_img");
		playercty_cbo = (Combobox*) wmgr->createWindow("TaharezLook/Combobox", "playercty_cbo");
		oppcty_cbo = (Combobox*) wmgr->createWindow("TaharezLook/Combobox", "oppcty_cbo");
		playMnuBack_btn = (PushButton*) wmgr->createWindow("TaharezLook/Button", "playMnuBack_btn");
		playMnuNext_btn = (PushButton*) wmgr->createWindow("TaharezLook/Button", "playMnuNext_btn");
		ImagesetManager::getSingleton().createFromImageFile("playMnuBG_img", "E:\\CricCEGUI\\Forest.png", ""); //The following 6 line has to be repeated for playercty_img & oppcty_img
		playMnuBG_img = wmgr->createWindow("TaharezLook/StaticImage", "playMnuBG_img");
		playMnuBG_img->setArea(URect (cegui_reldim (0), cegui_reldim (0), cegui_reldim (1), cegui_reldim (1)));
		playMnuBG_img->setProperty("FrameEnabled", "false");
		playMnuBG_img->setProperty("BackgroundEnabled", "false");
		playMnuBG_img->setProperty("Image", "set:playMnuBG_img image:full_image");		
		playWnd->addChildWindow(playMnuBG_img);
		playWnd->addChildWindow(playercty_img->getName());
		playWnd->addChildWindow(oppcty_img->getName());
		playWnd->addChildWindow(playercty_cbo);
		playWnd->addChildWindow(oppcty_cbo);
		playWnd->addChildWindow(playMnuBack_btn);
		playWnd->addChildWindow(playMnuNext_btn);
		return true;
	   }
       /*bool onMouseEnters(const EventArgs& e)
	   {
	    CEGUI::PushButton * pushButton = static_cast<CEGUI::PushButton*>(CEGUI::WindowManager::getSingletonPtr()->getWindow("play_btn"));
		pushButton->setText("Now Click!");
		return true;
	   }*/
	   bool optionsHandler(const EventArgs& e)
	   {
		wmgr = WindowManager::getSingletonPtr();
        optionsWnd = (FrameWindow*)wmgr->createWindow("TaharezLook/FrameWindow", "optionsWnd");
        optionsWnd->setPosition(UVector2(UDim(0.25f, 0.0f), UDim(0.25f, 0.0f)));
        optionsWnd->setSize(UVector2(UDim(0.5f, 0.5f), UDim(0.5f, 0.5f)));

		System::getSingleton().setGUISheet(optionsWnd);
		music_scr = (Scrollbar*)wmgr->createWindow("TaharezLook/Scrollbar", "music_scr");
		sound_scr = (Scrollbar*)wmgr->createWindow("TaharezLook/Scrollbar", "sound_scr");
		optionsMnuBack_btn = (PushButton*)wmgr->createWindow("TaharezLook/Button", "optionsMnuBack_btn");
		optionsMnuNext_btn = (PushButton*)wmgr->createWindow("TaharezLook/Button", "optionsMnuNext_btn");
		optionsMnuBack_btn->setPosition(UVector2(UDim(0.02f, 71.2f), UDim(0.3f, 71.2f)));
		optionsMnuBack_btn->setSize(UVector2(UDim(0.2f, 0.15f), UDim(0.15f, 0.15f)));
        optionsMnuBack_btn->setPosition(UVector2(UDim(1.5f, 71.2f), UDim(1.5f, 71.2f)));
		optionsMnuNext_btn->setSize(UVector2(UDim(0.2f, 0.15f), UDim(0.15f, 0.15f)));
		ImagesetManager::getSingleton().createFromImageFile("optionsMnuBG_img", "E:\\CricCEGUI\\bg.png", "");
		optionsMnuBG_img = wmgr->createWindow("TaharezLook/StaticImage", "optionsMnuBG_img");
		optionsMnuBG_img->setArea(URect (cegui_reldim (0), cegui_reldim (0), cegui_reldim (1), cegui_reldim (1)));
		optionsMnuBG_img->setProperty("FrameEnabled", "false");
		optionsMnuBG_img->setProperty("BackgroundEnabled", "false");
		optionsMnuBG_img->setProperty("Image", "set:optionsMnuBG_img image:full_image");		
		optionsWnd->addChildWindow(optionsMnuBG_img);
	    return true;
	   }
	   
	   bool creditsHandler(const EventArgs& e)
	   {
	    wmgr = WindowManager::getSingletonPtr();
		creditsWnd = (FrameWindow*)wmgr->createWindow("TaharezLook/FrameWindow", "creditsWnd");
	    creditsWnd->setPosition(UVector2(UDim(0.25f, 0.0f), UDim(0.25f, 0.0f)));
        creditsWnd->setSize(UVector2(UDim(0.5f, 0.5f), UDim(0.5f, 0.5f)));
        creditsMnuBack_btn = (PushButton*)wmgr->createWindow("TaharezLook/Button", "creditsMnuBack_btn");
        creditsMnuBack_btn->setPosition(UVector2(UDim(1.5f, 71.2f), UDim(1.5f, 71.2f)));
		creditsMnuBack_btn->setSize(UVector2(UDim(0.2f, 0.15f), UDim(0.15f, 0.15f)));
		ImagesetManager::getSingleton().createFromImageFile("creditsMnuBG_img", "E:\\CricCEGUI\\bg.png", "");
		creditsMnuBG_img = wmgr->createWindow("TaharezLook/StaticImage", "creditsMnuBG_img");
		creditsMnuBG_img->setArea(URect (cegui_reldim (0), cegui_reldim (0), cegui_reldim (1), cegui_reldim (1)));
		creditsMnuBG_img->setProperty("FrameEnabled", "false");
		creditsMnuBG_img->setProperty("BackgroundEnabled", "false");
		creditsMnuBG_img->setProperty("Image", "set:creditsMnuBG_img image:full_image");		
		creditsWnd->addChildWindow(creditsMnuBG_img);
		return true;
	   }

	   bool exitHandler(const EventArgs& e)
	   {
		WindowManager::getSingleton().destroyWindow(myRoot);
		//wmgr->destroyAllWindows();
	    return true;
	   }
       virtual bool OnEvent(const SEvent& event)
	   {
	    bool retval = ::myRenderer.injectEvent(event);
		if(retval)
		{
		 return true;
		}
        return false;
	   }

void Run()
{ 
 //device = createDevice(EDT_DIRECT3D9, core::dimension2d<u32>(800, 600), 16, false);//int last_fps = -1; 
 //CEGUI::IrrlichtRenderer &myRenderer = CEGUI::IrrlichtRenderer::bootstrapSystem(*device);
 //IGUIEnvironment* env = device->getGUIEnvironment();
// ::driver = device->getVideoDriver(); 
 //::smgr = device->getSceneManager();
 video::IVideoDriver* driver = ::device->getVideoDriver();
 ISceneManager* smgr = ::device->getSceneManager();
 while (::device->run() && driver)
 { 
  if(::device->isWindowActive()) 
  { 
   driver->beginScene(true, true, SColor(150, 50, 50, 50)); 
   smgr->drawAll(); 
   System::getSingleton().renderGUI(); 
   driver->endScene(); 
  } 
  ::device->drop();
 }

} 
~InitialMenu()
{
 delete[] InitialMenu::play_btn;
 delete[] InitialMenu::credits_btn;
 delete[] InitialMenu::exit_btn;
 delete[] InitialMenu::fWnd;
 delete[] InitialMenu::myRoot;
 delete[] InitialMenu::oppcty_cbo;
 delete[] InitialMenu::oppcty_img;
 delete[] InitialMenu::options_btn;
 delete[] InitialMenu::playercty_cbo;
 delete[] InitialMenu::playercty_img;
 delete[] InitialMenu::playMnuBack_btn;
 delete[] InitialMenu::playMnuNext_btn;
 delete[] InitialMenu::playWnd;
 delete[] InitialMenu::rp;
 delete[] InitialMenu::wmgr;
 delete[] InitialMenu::creditsWnd;
 delete[] InitialMenu::creditsMnuBack_btn;
 delete[] InitialMenu::optionsMnuBack_btn;
 delete[] InitialMenu::optionsMnuNext_btn;
 delete[] InitialMenu::optionsWnd;
 delete[] InitialMenu::music_scr;
 delete[] InitialMenu::sound_scr;
 delete[] InitialMenu::initialMnuBG_img;
 delete[] InitialMenu::playMnuBG_img;
 delete[] InitialMenu::optionsMnuBG_img;
 delete[] InitialMenu::creditsMnuBG_img;
 delete device;
}
};
int main ()
{ 
 InitialMenu* initMenu = new InitialMenu();
 initMenu->Run();
 initMenu->~InitialMenu();
 return 0;
}

Re: Exception

Niklas L27-Jun-10 21:29

Niklas L

27-Jun-10 21:29

Which buffer are you talking about? Give us a hint.

This looks messed up:

InitialMenu* initMenu = new InitialMenu();
initMenu->Run();
initMenu->~InitialMenu();

Normally, you should not call the destructor as a function. Use delete initMenu; instead, and the destructor will be called for you (and the memory you allocated will be freed.)

But I suggest

InitialMenu initMenu;
initMenu.Run();

home

Re: Exception

Aescleal27-Jun-10 22:01

Aescleal

27-Jun-10 22:01

Why are you using ::driver in some places and driver in others? I'd also be suspicious of having to array delete loads of things that are used just like single objects. I'd be doubly suspicious of having to delete objects that I didn't allocate with new but that might be just poor design on the part of the library.

That library looks pretty ghastly as well - are you sure there aren't some higher level interfaces in there somewhere you're not using? It looks really fiddly and low level to me.

Cheers,

Ash

Stdafx

VeSudha27-Jun-10 20:59

VeSudha

27-Jun-10 20:59

hi,

what is the use ofstdafx header file?

Re: Stdafx

Niklas L27-Jun-10 21:14

Niklas L

27-Jun-10 21:14

All code in it, mainly includes, is put in a precompiled header file (*.pch) once. If you compile two translation units (.cpp files) using precompiled headers, only the first will go through all the code in stdafx.h. The second will use the precompiled data found in the .pch file instead.

The main reason for this is compilation speed.

Normally you put stuff in stdafx.h that changes rarely, because if you modify it, it will trigger a full rebuild on the next compilation.

home

Usage of IHTMLElement

Pk.j27-Jun-10 18:36

Pk.j

27-Jun-10 18:36

Dear Friends,

Can you please send any sample code which shows a clear idea of implimentation of IHTMLElement in VC++ for retriving Input element. Please help soon.

Thankx Smile | :)

Re: Usage of IHTMLElement

Stephen Hewitt27-Jun-10 19:09

Stephen Hewitt

27-Jun-10 19:09

Show us what you've done so far.

Steve

Re: Usage of IHTMLElement

ThatsAlok27-Jun-10 19:14

ThatsAlok

27-Jun-10 19:14

Pk.j wrote:
Can you please send any sample code which shows a clear idea of implimentation of IHTMLElement in VC++ for retriving Input element. Please help soon

Are you able to read HTML file in IHTMLDocument?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: Usage of IHTMLElement

«_Superman_»27-Jun-10 19:23

«_Superman_»

27-Jun-10 19:23

If you're looking for an input element, there is an interface called IHTMLInputElement that may be useful to you.
An HTML element has many type of attributes that you can retrieve.
You haven't mentioned what you want to retrieve.

Here is an article that may be of help to you - Adding a custom search feature to CHtmlViews[^]

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Re: Usage of IHTMLElement

Pk.j27-Jun-10 21:39

Pk.j

27-Jun-10 21:39

Thank you for you advice.

Actually I want to retrieve 'id' Input element of a resource like Password Field in a webpage. I had tried this interface IHTMLInputElement, but it has no memberfunctions to retieve 'id' value. Thats why i'm especting 'IHTMLElement' may help us for getting 'id' value. If you are feeling this is the right way or we should take help of other COM interfaces to get my requiremet ,then please help me by sending a detail sample code for the interface.

Thanks

Re: Usage of IHTMLElement

«_Superman_»27-Jun-10 22:16

«_Superman_»

27-Jun-10 22:16

Yes, you must use IHTMLElement::get_id to get the id of an element.
Where are you facing the problem and what have you got so far.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Re: Usage of IHTMLElement

Pk.j27-Jun-10 22:48

Pk.j

27-Jun-10 22:48

Here is my code stuff through which i'm trying to abstract 'id' value

=======================================================================
IHTMLElement *pElement;
HRESULT hr;
TCHAR tChrID[500];
BSTR bStrID;

hr = pElement->get_id(&bStrID);
if (SUCCEEDED(hr))
{
CString StrS;
if (bStrID)
{
WideCharToMultiByte(CP_ACP, 0, bStrID, -1, tChrID, 500, NULL, NULL);
SysFreeString (bStrID);
}

StrS = tChrID;
WriteToLog(StrS); // Creating LOG of 'id'values
pElement ->Release();
}

int WriteToLog(CString strLog)
{
// Open the existing file, or, if the file does not exist,
// create a new file.

SYSTEMTIME systime;
//get universal system time
GetSystemTime(&systime);
CString strTemp;
strTemp.Format (_T("\n%s"), strLog);

HANDLE hFile;
DWORD dwBytesWritten, dwPos;
hFile = CreateFile (TEXT("\\progra~1\\softex\\omnipass\\LOG.TXT"), // Open Two.txt.
GENERIC_WRITE, // Open for writing
0, // Do not share
NULL, // No security
OPEN_ALWAYS, // Open or create
FILE_ATTRIBUTE_NORMAL, // Normal file
NULL); // No template file

if (hFile == INVALID_HANDLE_VALUE)
{
CloseHandle (hFile); // Close the file.
return 1;
}
else
{
// Append the log file at the end
dwPos = SetFilePointer (hFile, 0, NULL, FILE_END);
WriteFile (hFile, strTemp, (strTemp.GetLength() + 1),&dwBytesWritten, NULL);
}

CloseHandle (hFile);

return 0;
}

===========================================================================

But its crashing my application as soon as any website opened in Internet Explorer-8 .
Please let me knaow any mistake you find in my above stuff or eny other way we should impliment this interface .And please guide me

Thankx

Re: Usage of IHTMLElement

«_Superman_»27-Jun-10 22:51

«_Superman_»

27-Jun-10 22:51

pElement is only a pointer and is not initialized.
You have to get the IHTMLElement pointer and not just declare it.
This we usually get using a QueryInterface call on some other interface pointer.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Re: Usage of IHTMLElement

Pk.j27-Jun-10 23:54

Pk.j

27-Jun-10 23:54

I have modified as per your suggestion.My modified lines are in block letter .Please have a look on below & guide me--

=======================================================================
IHTMLElement *pElement;
IDispatch *pDispInput = NULL;
HRESULT hr;
TCHAR tChrID[500];
BSTR bStrID;

if ( pDispInput->QueryInterface(IID_IHTMLElement, (void **)&pElement)== S_OK)
{ hr = pElementLitu->get_id(&bStrID);
if (SUCCEEDED(hr))
{
CString StrS;
if (bStrID)
{
WideCharToMultiByte(CP_ACP, 0, bStrID, -1, tChrID, 500, NULL, NULL);
SysFreeString (bStrID);
}

StrS = tChrID;
WriteToLog(StrS); // Creating LOG of 'id'values
}
pElement ->Release();
}
pDispInput->Release();

========================================================================================

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.