bmpd不是只获取了bmp1位图的大小?为什么连位图的样子也获取了?

CClientDC rdc(this);

CDC dc1,dc2;

CBitmap bmp1,bmpd;

BITMAP bitmap;	

bmp1.LoadBitmap(IDB_BITMAP);

bmp1.GetBitmap(&bitmap); 

bmpd.CreateBitmap(bitmap.bmWidth,bitmap.bmHeight,1,bitmap.bmBitsPixel,NULL);  

	

dc1.CreateCompatibleDC(&rdc);

dc1.SelectObject(&bmp1);

		 

LPBYTE lpbts;

int ncount=0;

ncount=(bitmap.bmHeight*bitmap.bmWidthBytes);  

lpbts=new BYTE[ncount];

bmp1.GetBitmapBits(ncount,lpbts); 

bmpd.SetBitmapBits(ncount,lpbts);