question on BitBlt drawing routines / functions

[Leeman_s]

I have this function:

void Title()
{
	int width;
	int height;

	HDC hDC = GetDC(hWnd);
	RECT rcClient;
	GetClientRect(hWnd, &rcClient);

	HDC hDCBuffer = CreateCompatibleDC(hDC);
	HBITMAP hbmOldBuffer = (HBITMAP)SelectObject(hDCBuffer, c);

	//InvalidateRect(hWnd, &rcClient, TRUE);
	BitBlt(hDC, 0, 0, rcClient.right, rcClient.bottom, hDCBuffer, 0, 0, SRCPAINT);
	//InvalidateRect(hWnd, &rcClient, TRUE);
	PlaySound("intro.wav", NULL, SND_FILENAME);
}

I call Title() before the main windows loop, like this:

//.......
ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

	Title();
	PlaySound("intro.wav", NULL, SND_FILENAME);
	PlaySound("music1.wav", NULL, SND_FILENAME | SND_ASYNC | SND_LOOP);

	//Working example
	//PlaySound("a.wav", NULL, SND_FILENAME | SND_ASYNC | SND_LOOP);

    // Step 3: The Message Loop
    for(;;)
    {
		if(newgame == true)
		{
			players = GetPlayers(*phWnd);
			SetPlayers();
			newgame = false;
			finished = false;
			SetQuestions();
		}

		GetMessage(&Msg, NULL, 0, 0);
		if(Msg.message == WM_QUIT || Msg.message == WM_DESTROY)
			break;

        TranslateMessage(&Msg);
        DispatchMessage(&Msg);

		if(finished == false)
		    MainLoop(*phWnd, players);
		else if(endone == false)
			End();
    }
    return Msg.wParam;
}

should this display anything onto the screen? for some reason, it doesn't. What did I do wrong?

[Leeman_s]

Again, I figured this one on my own.....but this brings on another question:

The problem with my code was this line:

c = LoadBitmap(NULL, MAKEINTRESOURCE(IDB_C));

For the bitmap to be loaded correctly, the line has to be:

c = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_C));

Isn't that the same as NULL? The same is with loading icons.

[novacain]

No

HINSTANCE = GetModuleHandle(NULL);

HINSTANCE != NULL ( or your app is not running)

also

HDC hDC = GetDC(hWnd);
//this reqires a ReleaseDC() call to return the GDI resources you have allocated.

HBITMAP hbmOldBuffer = (HBITMAP)SelectObject(hDCBuffer, c);

//Great you catch the HBITMAP already in the DC but where do you return it?
So the DC is EXACTLY the same when the function exits as when the function started?

c = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_C));

//this requires a DeleteObject() call after you have finished with the image. LoadBitmap() is old. LoadImage() is better, particularly if you need to print them (as you can easily create DIB's)

[Leeman_s]

yeah i have it all fixed up