bitmap aus resourcen datei wird nicht angezeigt

/*---------------------------------------------------------
   SYSMETS1.C -- Ermittlung der Maße des Systems, Version 1
                 (c) Charles Petzold, 1998
  ---------------------------------------------------------*/
#include <windows.h>
#include "resource.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName[] = TEXT ("SysMets1") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;

     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;

     if (!RegisterClass (&wndclass))
     {    // UNICODE-Compilierung ist die einzige realistische Fehlermöglichkeit 
          MessageBox (NULL, TEXT ("Programm arbeitet mit Unicode und setzt Windows NT voraus!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }

     hwnd = CreateWindow (szAppName, TEXT ("Metriken des Systems, V 1"),
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          NULL, NULL, hInstance, NULL) ;

     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
     while (GetMessage (&msg, NULL, 0, 0))
          {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
          }
     return msg.wParam ;
     }

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	HDC hdc, hdcMem;
	PAINTSTRUCT ps;
	BITMAP bitmap;
	HBITMAP hBitmap;
	HINSTANCE hInstance;

     switch (message)
     {
     case WM_CREATE:
		  hInstance=((LPCREATESTRUCT)lParam)->hInstance;
		  hBitmap=LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP1));
		  GetObject(hBitmap, sizeof(BITMAP), &bitmap);
          return 0 ;

     case WM_PAINT :
		  hdc=BeginPaint(hwnd, &ps);
		  hdcMem=CreateCompatibleDC(hdc);
		  SelectObject(hdcMem, hBitmap);
		  BitBlt(hdc, 50,50, bitmap.bmWidth, bitmap.bmHeight, hdcMem,0,0,SRCCOPY);
		  DeleteDC(hdcMem);
		  EndPaint(hwnd, &ps);
          return 0 ;

     case WM_DESTROY :
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}

resource.h:

//{{NO_DEPENDENCIES}}
// Microsoft Developer Studio generated include file.
// Used by icondemo.rc
//
#define IDB_BITMAP1 101

// Next default values for new objects
//
#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

icondemo.rc:

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

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "afxres.h"

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

/////////////////////////////////////////////////////////////////////////////
// Deutsch (Deutschland) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_DEU)
#ifdef _WIN32
LANGUAGE LANG_GERMAN, SUBLANG_GERMAN
#pragma code_page(1252)
#endif //_WIN32

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

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

2 TEXTINCLUDE DISCARDABLE
BEGIN
"#include ""afxres.h""\r\n"
"\0"
END

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

#endif // APSTUDIO_INVOKED

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

IDB_BITMAP1 BITMAP DISCARDABLE "bitmap1.bmp"
#endif // Deutsch (Deutschland) resources
/////////////////////////////////////////////////////////////////////////////

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

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

geeky

Ja, dann ersma Rückgabewerte prüfen

Hepi

Mach bitmap und hBitmap mal static.

static BITMAP bitmap;
static HBITMAP hBitmap;

Jippie. Danke!!
- Aber warum static?

miller_m

fies schrieb:

Jippie. Danke!!
- Aber warum static?

wenn du die WndProc verlässt zerstörst du variablen, static vars bleiben im speicher.

lebensdauer
http://tutorial.schornboeck.net/scope.htm
static
http://tutorial.schornboeck.net/static.htm

Habe ein weiteres Problem.

//Variablen für Bild
    HDC hdc, hdcMem; 
    PAINTSTRUCT ps; 
    static BITMAP bitmap; 
    static HBITMAP hBitmap; 
    HINSTANCE hInstance; 

	//Variablen für Button
	static HWND hwndSmaller;

     switch (message) 
     { 
     case WM_CREATE:
		 {//Bild vorbereiten
          hInstance=((LPCREATESTRUCT)lParam)->hInstance; 
          hBitmap=LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP1)); 
          GetObject(hBitmap, sizeof(BITMAP), &bitmap); 

		  //Button vorbereiten
		  hwndSmaller=CreateWindow(NULL,NULL,
									WS_CHILD|WS_VISIBLE|BS_BITMAP,
									0,0,80,80,
									hwnd,(HMENU)300,hInstance,NULL);
		  SendMessage(hwndSmaller,BM_SETIMAGE ,IMAGE_BITMAP, hBitmap);

Ich möchte eine Bitmap als Button definieren aber irgendwie wird er nicht angezeigt.

geeky

Du willst als Fensterklasse bestimmt eher "BUTTON" als NULL benutzen ?

//Button vorbereiten
		  hwndSmaller=CreateWindow(TEXT("BUTTON"),NULL,
									WS_CHILD|WS_VISIBLE|BS_BITMAP,
									50,90,80,80,
									hwnd,(HMENU)300,hInstance,NULL);
		  SendMessage(hwndSmaller,BM_SETIMAGE , (WPARAM) IMAGE_BITMAP, (LPARAM) hBitmap);

Funxt leider immer noch nicht.

Hier funktionierts nicht:

//Button vorbereiten
		  hwndSmaller=CreateWindow(TEXT("BUTTON"),NULL,
									WS_CHILD|WS_VISIBLE|BS_BITMAP,
									50,90,80,80,
									hwnd,(HMENU)300,hInstance,NULL);
		  //if(hwndSmaller!=NULL) MessageBox(0,"lol",0,0);
		  SendMessage(hwndSmaller,BM_SETIMAGE , (WPARAM) IMAGE_BITMAP, (LPARAM) hBitmap);

Hier wird der Button angezeigt:

//Button vorbereiten
		  hwndSmaller=CreateWindow(TEXT("BUTTON"),NULL,
									WS_CHILD|WS_VISIBLE|BS_BITMAP,
									50,90,80,80,
									hwnd,(HMENU)300,hInstance,NULL);
		  if(hwndSmaller!=NULL) MessageBox(0,"lol",0,0);
		  SendMessage(hwndSmaller,BM_SETIMAGE , (WPARAM) IMAGE_BITMAP, (LPARAM) hBitmap);

...Hallo - warum?