loading bitmaps

[goody11]

I'm trying to load a bit map but the picture won't come up. It compiles just fine. I'm not sure if this makes a difference either but I am trying to load a bitmap into a dialog box. Here's the code:

The .cpp file:

#include "windows.h"
#include "resource.h"

HBITMAP g_hbmHang = NULL;

BOOL CALLBACK DlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
	switch(Message)
	{
		case WM_CREATE:
			g_hbmHang = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_HANG));
			if(g_hbmHang == NULL)
				MessageBox(hwnd, "Could not load IDB_HANG!", "Error", MB_OK |MB_ICONEXCLAMATION);
		break;
		case WM_CLOSE:
			DestroyWindow(hwnd);
		break;
		case WM_PAINT:
		{

			BITMAP bm;
			PAINTSTRUCT ps;

			HDC hdc = BeginPaint(hwnd, &ps);

			HDC hdcMem = CreateCompatibleDC(hdc);
			HBITMAP hbmOld = (HBITMAP)SelectObject (hdcMem, g_hbmHang);

			GetObject(g_hbmHang, 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_hbmHang);
			PostQuitMessage(0);
		break;
		default:
			return FALSE;
	}
	return TRUE;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	return DialogBox(hInstance, MAKEINTRESOURCE(IDD_MAIN), NULL, DlgProc);
}

The resource file:

//Microsoft Developer Studio generated resource script.
//
#include "resource.h"

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#ifndef __BORLANDC__
#include "winres.h"
#endif

/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS

/////////////////////////////////////////////////////////////////////////////
// English (Canada) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENC)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_CAN
#pragma code_page(1252)
#endif //_WIN32

#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//

1 TEXTINCLUDE DISCARDABLE 
BEGIN
    "resource.h\0"
END

2 TEXTINCLUDE DISCARDABLE 
BEGIN
    "#ifndef __BORLANDC__\r\n"
    "#include ""winres.h""\r\n"
    "#endif\r\n"
    "\0"
END

3 TEXTINCLUDE DISCARDABLE 
BEGIN
    "\r\n"
    "\0"
END

#endif    // APSTUDIO_INVOKED



IDD_MAIN DIALOG DISCARDABLE  0, 0, 207, 156
STYLE DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
CAPTION "Controls One"
FONT 8, "MS Sans Serif"
BEGIN
    LTEXT           "Add",IDC_STATIC,7,10,14,8
END


/////////////////////////////////////////////////////////////////////////////
//
// Bitmap
//

IDB_HANG               BITMAP  DISCARDABLE     "hang.bmp"
#endif    // English (Canada) resources
/////////////////////////////////////////////////////////////////////////////



#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//


/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

The resource.h file:
#define IDD_MAIN 100
#define IDB_HANG 101
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE 102
#define _APS_NEXT_COMMAND_VALUE 40001
#define _APS_NEXT_CONTROL_VALUE 1000
#define _APS_NEXT_SYMED_VALUE 101
#endif
#endif[/code]

[__avd]

Download code from http://winprog.org/tutorial/ and compare it with your code.

[Laiq Ahmed]

Hi,
why you've called LoadBitmap(...) in WM_CREATE message? I am sure your problem will be resolved if you change WM_CREATE to WM_INITDIALOG.
further you should learn and understand the difference between WM_CREATE & WM_INITDIALOG.

[goody11]

Thanks that worked perfect.

[amarucla]

Hi goody11,

I'm trying to write a similar program where I can display an image in a dialogbox. I've posted a thread on how to do it....but no response from anyone.
http://www.daniweb.com/forums/thread210539.html

Now i'm trying to use your program, to see if I can extend it for my purpose. I'm getting a compile error "cannot open include file winres.h" Where does this file come from?

Thanks,
Amar

[goody11]

I downloaded winres.h. If you look in the resource file, and see where I include it, you can replace it with afxres.h instead.