Not loading bmp ?

(Mingw - WinXP)
I've been having trouble with this for awhile, it seems my program just refuses to load this .bmp file. I'm not sure if its a bad resource or bad code...

Can anyone see why this doesnt load? (This is mostly the forgers tutorial with some adjustments.

Code:

//Resource.rc
IDB_BALL                BITMAP  DISCARDABLE     "C:\\ball.bmp"

Resource.rc compiled into Resource.o sucessfully.

Code:

//Rpg.cpp
//Message loop, only part dealing with the bmp.

// Included elsewhere #define IDB_BALL 1

 switch(msg) {

  case WM_CLOSE:
   DestroyWindow(hwnd);
   break;

  case WM_DESTROY:
   DeleteObject(ScreenDisplay_Object);
   PostQuitMessage(0);
   break;

  case WM_CREATE:
   ScreenDisplay_Object = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_BALL));
   if(ScreenDisplay_Object == NULL)
    MessageBox(hwnd, "Could not load object!", "Error", MB_OK | MB_ICONEXCLAMATION);
   break;

  case WM_PAINT: {
   BITMAP bm;
   PAINTSTRUCT ps;

   HDC hdc = BeginPaint(hwnd, &ps); // 31

   HDC hdcMem = CreateCompatibleDC(hdc);
   HBITMAP hbmOld = (HBITMAP)SelectObject(hdcMem, ScreenDisplay_Object); //34

   GetObject(ScreenDisplay_Object, sizeof(bm), &bm);

   BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, hdcMem, 0, 0, SRCCOPY);

   SelectObject(hdcMem, hbmOld);
   DeleteDC(hdcMem);
 
   EndPaint(hwnd, &ps);
   }
   break;

  default:
   return DefWindowProc(hwnd, msg, wParam, lParam);
 }

Rpg.cpp compiled into Rpg.o sucessfully

Code:

$ g++ -o C:/Rpg.exe C:\\Rpg.o C:\\Resource.o -mwindows

Mingw compiles sucessfully, nothing goes wrong, but the bmp just doesnt load. Does anyone see why? >.>

The file exists . . . ?

Maybe this should be moved to the Windows programming forum.

No, it doesnt exit, it just bring up an error window (As it should) stating the bitmap was not loaded.

Wasnt sure if it was a resource error or a code error, so I generalized it to being a C++ error hehe.

Is there a getlasterror? I'm not sure, but 1 seems like a strange resource id.

I'm not sure how to check for the last error -,-.

I changed the resource ID just to be sure (1 to 101). It still was unsucessful.

Originally Posted by Blackroot

I'm not sure how to check for the last error -,-.

It's a function. As simple as DWORD GetLastError (void). However, if you want something more meaningful than a number you'd have to pass that value to FormatMessage, which is not as simple.
http://msdn.microsoft.com/library/de...matmessage.asp

>#define IDB_BALL 1
Did you include this line in your Resource.rc?

Lol! Good call swoopy, that was my problem, I didint realise you needed to define (Or could define) an object in the .rc file. Thanks .

Blackroot, for your reference, I read it in the Forger's tutorial.

Now what about this #include "resource.h" ? Well your program needs a way to identify the icon, and the best way to do that is to assign it a unique ID (IDI_MYICON). We can do this by creating the file "resource.h" and including it in both our resource script, and our source file.

Here: http://www.winprog.org/tutorial/resources.html