若我的小家

顯示位圖，你應(yīng)該使用GDI+里面的Bitmap類或者Image類，這兩個(gè)類都提供了方法從硬盤上的一個(gè)文件打開文件，創(chuàng)建相應(yīng)的內(nèi)存中的位圖對(duì)象的工作。然后你可以使用Graphics類的DrawImage方法來(lái)繪制該位圖。
下面的代碼初始化GDI+，顯示一個(gè)打開文件對(duì)話框并且創(chuàng)建Bitmap對(duì)象，顯示位圖：

GdiplusStartupInput input;
 ULONG_PTR gdiPlusToken;
 if(GdiplusStartup(&gdiPlusToken,&input,NULL)!=Ok)
 {
  return -1;
 }

char fileName[200];
     OPENFILENAME openStruct;
     memset(&openStruct,0,sizeof(OPENFILENAME));
     openStruct.lStructSize=sizeof(OPENFILENAME);
     openStruct.Flags=OFN_EXPLORER;
     openStruct.lpstrFilter="Jpeg files(*.jpg)\0*.jpg\0\0";
     openStruct.lpstrFile=fileName;
     openStruct.nMaxFile=200;
     if(GetOpenFileName(&openStruct))
     {
      imageFileName=fileName;
      }

HDC hdc=GetDC(hPicWnd);
   if(hdc==NULL)
   {
    MessageBox(NULL,"","",MB_OK);
   }
   Graphics *g=new Graphics(hdc);
   WCHAR tmpFileName[100];
   size_t numOfChars;
   if(/*mbstowcs_s(&numOfChars,tmpFileName,100,fileName,199)*/MultiByteToWideChar(CP_ACP,MB_COMPOSITE,imageFileName.c_str(),200,tmpFileName,100)/*==-1*/)
   {
    MessageBox(NULL,"Error occured in string convertion!","Error!",MB_OK);       
    return wParam;
   }

HWND hPicWnd；
   RECT rc;
   GetWindowRect(hPicWnd,&rc);

   RectF drawRect(rc.left,rc.top,rc.right-rc.left,rc.bottom-rc.top);
    Bitmap *bmp=new Bitmap(tmpFileName);
   bmpMain=bmp;
   g->DrawImage(bmp,drawRect);
   delete g;

   ReleaseDC(hwnd,hdc);

GdiplusShutdown(gdiPlusToken);