MFC 如何修改BMP图片的大小

MFC可以在加载图片的时候修改图片大小，我用的一个函数是：

HANDLE LoadImage(
  HINSTANCE hinst,   // handle to instance
  LPCTSTR lpszName,  // name or identifier of the image
  UINT uType,        // image type
  int cxDesired,     // desired width
  int cyDesired,     // desired height
  UINT fuLoad        // load options
);

#define HBMP(filepath,width,height)	(HBITMAP)LoadImage(AfxGetInstanceHandle(),filepath,IMAGE_BITMAP,width,height,LR_LOADFROMFILE|LR_CREATEDIBSECTION)

	this->GetClientRect(&rect);
	rect.SetRect(rect.left,rect.top+50,rect.right,rect.top+150);
	p_picture = new CStatic;
	p_picture->Create("",WS_VISIBLE|SS_BITMAP,rect,this,IDC_STATIC_PICTURE);
	SwitchJpegToBmp();
	HBITMAP h_bitmap = HBMP("./res/res.bmp",rect.right,50);
	p_picture->SetBitmap(h_bitmap);