Winprog BMP tutorial not working

This is a discussion on Winprog BMP tutorial not working within the C++ Programming forums, part of the General Programming Boards category; I downloaded the winprog.org bmp tutorial and when I complile and run the program it gives the error "Could not ...

  1. #1
    Registered User
    Join Date
    Mar 2005
    Posts
    26

    Winprog BMP tutorial not working

    I downloaded the winprog.org bmp tutorial and when I complile and run the program it gives the error "Could not load IDB_BALL!" which is an error handler within the program. However it should be loading the picture. I am using latest version of Dev C++. Any ideas? Here is the code:

    Code:
    #include <windows.h>
    #include "resource.h"
    
    
    const char g_szClassName[] = "myWindowClass";
    
    HBITMAP g_hbmBall;
    
    LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
    {
    	switch(msg)
    	{
    		case WM_CREATE:
    			g_hbmBall = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_BALL));
    			if(g_hbmBall == NULL)
    				MessageBox(hwnd, "Could not load IDB_BALL!", "Error", MB_OK | MB_ICONEXCLAMATION);
    		break;
    		case WM_CLOSE:
    			DestroyWindow(hwnd);
    		break;
    		case WM_PAINT:
    		{
    			// Just a note, never use a MessageBox from inside WM_PAINT
    			// The box will cause more WM_PAINT messages and you'll probably end up
    			// stuck in a loop
    
    			BITMAP bm;
    			PAINTSTRUCT ps;
    
    			HDC hdc = BeginPaint(hwnd, &ps);
    
    			HDC hdcMem = CreateCompatibleDC(hdc);
    			HBITMAP hbmOld = SelectObject(hdcMem, g_hbmBall);
    
    			GetObject(g_hbmBall, sizeof(bm), &bm);
    
    			BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, hdcMem, 0, 0, SRCCOPY);
    
    			SelectObject(hdcMem, hbmOld);
    			DeleteDC(hdcMem);
    
    			EndPaint(hwnd, &ps);
    		}
    		break;
    		case WM_DESTROY:
    			DeleteObject(g_hbmBall);
    			PostQuitMessage(0);
    		break;
    		default:
    			return DefWindowProc(hwnd, msg, wParam, lParam);
    	}
    	return 0;
    }
    
    int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    	LPSTR lpCmdLine, int nCmdShow)
    {
    	WNDCLASSEX wc;
    	HWND hwnd;
    	MSG Msg;
    
    	wc.cbSize		 = sizeof(WNDCLASSEX);
    	wc.style		 = 0;
    	wc.lpfnWndProc	 = WndProc;
    	wc.cbClsExtra	 = 0;
    	wc.cbWndExtra	 = 0;
    	wc.hInstance	 = hInstance;
    	wc.hIcon		 = LoadIcon(NULL, IDI_APPLICATION);
    	wc.hCursor		 = LoadCursor(NULL, IDC_ARROW);
    	wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
    	wc.lpszMenuName  = NULL;
    	wc.lpszClassName = g_szClassName;
    	wc.hIconSm		 = LoadIcon(NULL, IDI_APPLICATION);
    
    	if(!RegisterClassEx(&wc))
    	{
    		MessageBox(NULL, "Window Registration Failed!", "Error!",
    			MB_ICONEXCLAMATION | MB_OK);
    		return 0;
    	}
    
    	hwnd = CreateWindowEx(
    		WS_EX_CLIENTEDGE,
    		g_szClassName,
    		"A Bitmap Program",
    		WS_OVERLAPPEDWINDOW,
    		CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
    		NULL, NULL, hInstance, NULL);
    
    	if(hwnd == NULL)
    	{
    		MessageBox(NULL, "Window Creation Failed!", "Error!",
    			MB_ICONEXCLAMATION | MB_OK);
    		return 0;
    	}
    
    	ShowWindow(hwnd, nCmdShow);
    	UpdateWindow(hwnd);
    
    	while(GetMessage(&Msg, NULL, 0, 0) > 0)
    	{
    		TranslateMessage(&Msg);
    		DispatchMessage(&Msg);
    	}
    	return Msg.wParam;
    }
    And yes, the .bmp file, resource.h and bmp_one.rc are all present in the folder.

  2. #2
    Registered User
    Join Date
    Jan 2005
    Posts
    847
    Is the rc file part of your project?

  3. #3
    Registered User
    Join Date
    Mar 2005
    Posts
    26
    Quote Originally Posted by Quantum1024
    Is the rc file part of your project?
    excellent, thank you, that was the problem

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