VC中如何顯示一張位圖

[1]位圖資源的顯示（設資源ID為IDB——BITMAP1程式如下）

{

CBitmap bitmap;

CBitmap* pOldBitmap;

CDC MemDC;

MemDC.CreateCompatibleDC(&dc); ///建立與顯示裝置相容的記憶體裝置場境

bitmap.LoadBitmap(IDB_BITMAP1); ///取出位圖資源

pOldBitmap=MemDC.SelectObject(&bitmap); ///将位圖選入記憶體場境

dc.BitBlt(50,50,48,48,&MemDC,0,0,SRCCOPY); ///顯示它

MemDC.SelectObject(pOldBitmap);

}      

[2]建立位圖，然後在裡面畫上圖形，再顯示它

{

CBitmap bitmap;

CBitmap* pOldBitmap;

CDC MemDC;

int i;

CPen pen;

CPen* oldpen;

MemDC.CreateCompatibleDC(&dc); ///建立與顯示裝置相容的記憶體裝置場境

bitmap.CreateCompatibleBitmap(&dc,100,100);///建立與顯示裝置相容的位圖

pOldBitmap=MemDC.SelectObject(&bitmap); ///将位圖選入記憶體場境

for(i=0;i <100;i++)

{ ///畫100根線

pen.CreatePen(PS_SOLID,1, RGB(0,0,i*2+55));

oldpen=MemDC.SelectObject(&pen);

MemDC.MoveTo(0,i);

MemDC.LineTo(100,i);

MemDC.SelectObject(oldpen);

pen.DeleteObject();

}

dc.BitBlt(50,50,100,100,&MemDC,0,0,SRCCOPY); ///顯示它

MemDC.SelectObject(pOldBitmap);

}      

[3]顯示磁盤上的外部BMP檔案

{

HBITMAP bitmap;

/////讀取位圖檔案SAMPLE.BMP

bitmap=(HBITMAP)LoadImage(AfxGetInstanceHandle(), "SAMPLE.BMP ",IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);

ASSERT(bitmap);

HBITMAP OldBitmap;

CDC MemDC;CRect rect;

MemDC.CreateCompatibleDC(&dc);

GetClientRect(rect);

OldBitmap=(HBITMAP)MemDC.SelectObject(bitmap);

///顯示它

dc.BitBlt(20,20,rect.Width()-20,rect.Height()-20,&MemDC,0,0,SRCCOPY);

MemDC.SelectObject(OldBitmap);

}      

HBITMAP hBitmap;

hBitmap = LoadBitmap(AfxGetInstanceHandle(),MAKEINTRESOURCE(IDB_BITMAP2));

BITMAP bmp;

GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bmp);