【MFC相关】图片显示

CPaintDC dc(this); 

if (!m_hBitmap) return;
image.Attach(m_hBitmap);
CRect rect;
GetClientRect(&rect);//获得控件所在的矩形区域
int width = rect.Width();
int height = rect.Height();
//......

CDC mDC;
mDC.CreateCompatibleDC(&dc);
CBitmap b;
b.CreateCompatibleBitmap(&dc, width, height);
mDC.SelectObject(&b);
mDC.SetStretchBltMode(HALFTONE);
mDC.FillSolidRect(, , width, height, RGB(, , ));//设置背景颜色
image.StretchBlt(mDC.m_hDC, marginx, marginy, width-*marginx, height-*marginy);
BitBlt(dc.m_hDC, , , width, height, mDC.m_hDC, , , SRCCOPY);
mDC.DeleteDC();
::DeleteObject(&b);
m_hBitmap = image.Detach();