请大家帮我看下LoadImage();

[marveson]

case WM_CREATE:
hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;
SetButton.Style = BS_PUSHBUTTON;
SetButton.Text = TEXT("陈杰");
hButton = CreateWindow(TEXT("button"),SetButton.Text,WS_CHILD | WS_VISIBLE | SetButton.Style,10,10,100,50,hWnd,NULL,NULL,NULL);//创建BUTTON。
//hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;

//GetObject (Bt_Chen, sizeof (BITMAP), &bitmap) ;
return 0;
case WM_SIZE:
cxApplication = LOWORD(lParam);
cyApplication = HIWORD(lParam);
return 0;
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
//DeleteObject(Bt_Chen) ;
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:

hdc = BeginPaint(hWnd, &ps);
HdcWindow=CreateCompatibleDC(hdc);
Bt_Chen = (HBITMAP)LoadImage(NULL,TEXT("C:\\Documents and Settings\\edgar.caya\\My Documents\\Visual Studio 2008\\Projects\\DYControler\\DYControler\\chenjie.bmp"),IMAGE_BITMAP,10,10,LR_CREATEDIBSECTION | LR_DEFAULTSIZE |LR_LOADFROMFILE );
//bitmap.Attach(hbitmap);
SelectObject(HdcWindow,Bt_Chen);
BitBlt(hdc, 10, 10, 100, 50,HdcWindow, 0, 0, SRCCOPY);
ReleaseDC(hWnd,HdcWindow);
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
DeleteObject (HdcWindow) ;
PostQuitMessage(0);
break;




我为什么始终都弄不上去图片。

[sjdev]

Bt_Chen = (HBITMAP)LoadImage(NULL,TEXT("C:\\Documents and Settings\\edgar.caya\\My Documents\\Visual Studio 2008\\Projects\\DYControler\\DYControler\\chenjie.bmp"),IMAGE_BITMAP,10,10,LR_CREATEDIBSECTION | LR_DEFAULTSIZE |LR_LOADFROMFILE );

资源句柄，设置一下。

[菜鸟二号]

Bt_Chen = (HBITMAP)LoadImage(NULL,TEXT("C:\\Documents and Settings\\edgar.caya\\My Documents\\Visual Studio 2008\\Projects\\DYControler\\DYControler\\chenjie.bmp"),IMAGE_BITMAP,10,10,LR_CREATEDIBSECTION | LR_DEFAULTSIZE |LR_LOADFROMFILE );
//bitmap.Attach(hbitmap);
SelectObject(HdcWindow,Bt_Chen);
BitBlt(hdc, 10, 10, 100, 50,HdcWindow, 0, 0, SRCCOPY);


就是这里的问题LoadImage(.......IMAGE_BITMAP,10,10...);这个尺寸有问题噻

[菜鸟二号]

不是，貌似是我看错了，那你就检测下位图有没有载入啊，Bt_Chen?0:1;

[菜鸟二号]

另外吧
ReleaseDC(hWnd,HdcWindow); //这个应该用DeleteDC()吧
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
DeleteObject (HdcWindow) ; //这里是不是DeleteObject(Bt_Chen);?
PostQuitMessage(0);
break;
而且程序其他的地方貌似没什么问题了，基本可以肯定是你的位图路径有问题

[marveson]

我加了判断
非NULL。
很是疑惑啊，尺寸都是我自己随便加的，尺寸不对不会显示吗。不会吧。

[wltg2001]

Bt_Chen = (HBITMAP)LoadImage(NULL,TEXT("C:\\Documents and Settings\\edgar.caya\\My Documents\\Visual Studio 2008\\Projects\\DYControler\\DYControler\\chenjie.bmp"),IMAGE_BITMAP,10,10,LR_CREATEDIBSECTION | LR_DEFAULTSIZE |LR_LOADFROMFILE );
＝＝＝＝＝＝＝＝＝＝＝
改成这样：
Bt_Chen = (HBITMAP)LoadImage(NULL,TEXT("C:\\Documents and Settings\\edgar.caya\\My Documents\\Visual Studio 2008\\Projects\\DYControler\\DYControler\\chenjie.bmp"),IMAGE_BITMAP,0,0, LR_DEFAULTSIZE |LR_LOADFROMFILE );

[marveson]

还是不行啊。``~crazy.~~

[marveson]

路径我检查了，没有错误。PAINT这里怎么回事啊，是不是别的地方写错了。

[sjdev]

和下面这个函数比较一下，下面的函数是一个封装。

BOOL LoadBitmapFromBMPFile( LPTSTR szFileName, HBITMAP *phBitmap,
   HPALETTE *phPalette )
   {

   BITMAP  bm;

   *phBitmap = NULL;
   *phPalette = NULL;

   // Use LoadImage() to get the image loaded into a DIBSection
   *phBitmap = (HBITMAP)LoadImage( NULL, szFileName, IMAGE_BITMAP, 0, 0,
               LR_CREATEDIBSECTION | LR_DEFAULTSIZE | LR_LOADFROMFILE );
   if( *phBitmap == NULL )
     return FALSE;

   // Get the color depth of the DIBSection
   GetObject(*phBitmap, sizeof(BITMAP), &bm );
   // If the DIBSection is 256 color or less, it has a color table
   if( ( bm.bmBitsPixel * bm.bmPlanes ) <= 8 )
   {
   HDC           hMemDC;
   HBITMAP       hOldBitmap;
   RGBQUAD       rgb[256];
   LPLOGPALETTE  pLogPal;
   WORD          i;

   // Create a memory DC and select the DIBSection into it
   hMemDC = CreateCompatibleDC( NULL );
   hOldBitmap = (HBITMAP)SelectObject( hMemDC, *phBitmap );
   // Get the DIBSection's color table
   GetDIBColorTable( hMemDC, 0, 256, rgb );
   // Create a palette from the color tabl
   pLogPal = (LOGPALETTE *)malloc( sizeof(LOGPALETTE) + (256*sizeof(PALETTEENTRY)) );
   pLogPal->palVersion = 0x300;
   pLogPal->palNumEntries = 256;
   for(i=0;i<256;i++)
   {
     pLogPal->palPalEntry[i].peRed = rgb[i].rgbRed;
     pLogPal->palPalEntry[i].peGreen = rgb[i].rgbGreen;
     pLogPal->palPalEntry[i].peBlue = rgb[i].rgbBlue;
     pLogPal->palPalEntry[i].peFlags = 0;
   }
   *phPalette = CreatePalette( pLogPal );
   // Clean up
   free( pLogPal );
   SelectObject( hMemDC, hOldBitmap );
   DeleteDC( hMemDC );
   }
   else   // It has no color table, so use a halftone palette
   {
   HDC    hRefDC;

   hRefDC = GetDC( NULL );
   *phPalette = CreateHalftonePalette( hRefDC );
   ReleaseDC( NULL, hRefDC );
   }
   return TRUE;

   }

[sjdev]

这是Paint里面的使用，比较一下吧。

case WM_PAINT:
   {
     PAINTSTRUCT   ps;
     HBITMAP       hBitmap, hOldBitmap;
     HPALETTE      hPalette, hOldPalette;
     HDC           hDC, hMemDC;
     BITMAP        bm;

   hDC = BeginPaint( hWnd, &ps );

   if( LoadBitmapFromBMPFile( szFileName, &hBitmap, &hPalette ) )
   {
      GetObject( hBitmap, sizeof(BITMAP), &bm );
      hMemDC = CreateCompatibleDC( hDC );
      hOldBitmap = (HBITMAP)SelectObject( hMemDC, hBitmap );
      hOldPalette = SelectPalette( hDC, hPalette, FALSE );
      RealizePalette( hDC );

      BitBlt( hDC, 0, 0, bm.bmWidth, bm.bmHeight,
              hMemDC, 0, 0, SRCCOPY );

      SelectObject( hMemDC, hOldBitmap );
      DeleteObject( hBitmap );
      SelectPalette( hDC, hOldPalette, FALSE );
      DeleteObject( hPalette );
   }
   EndPaint( hWnd, &ps );

   }
   break;
	

[wltg2001]

我试了你的代码，将LoadImage中的图片大小全改为0后就可以正常显示了

[菜鸟二号]

无论怎样我的都能显示，真的很奇怪啊，但是你的就是不显示，你换个图看看吧（最好放D盘之类的，D:\1.bmp多简单啊），如果还是不行那就奇怪的很乐

[wltg2001]

估计和你的图片有关吧

[许文君]

style&=BS_BITMAP;

[cuihaoyun]

因为你把关联的DC释放了 这句:ReleaseDC(hWnd,HdcWindow);

[cuihaoyun]

看错 说了写废话!!!~_~