MFC位图自适应Picture Control控件大小

试了n个方法，查了n多资料。终于弄出来了~~~~

void CTestDlg::AddPitcure()
{

CBitmap bitmap;
//加载指定位图资源 Bmp图片ID
bitmap.LoadBitmap(IDB_BITMAP_MAIN);
//获取对话框上的句柄 图片控件ID
CStatic *p=(CStatic *)GetDlgItem(IDC_MAINMode);
//设置静态控件窗口风格为位图居中显示
p->ModifyStyle(0xf,SS_BITMAP|SS_CENTERIMAGE);
//将图片设置到Picture控件上
p->SetBitmap(bitmap);

BITMAP bmpInfo;
bitmap.GetBitmap(&bmpInfo);
CDC dcMemory;
CDC* pDC=GetDlgItem(IDC_MAINMode)->GetDC();
dcMemory.CreateCompatibleDC(pDC);
CBitmap* pOldBitmap = dcMemory.SelectObject(&bitmap);
CRect rect;
m_Picture.GetClientRect(&rect);
int nX = rect.left + (rect.Width() - bmpInfo.bmWidth) / 2;
int nY = rect.top + (rect.Height() - bmpInfo.bmHeight) / 2;
//pDC->BitBlt(0, 0, bmpInfo.bmWidth, bmpInfo.bmHeight, &dcMemory, 0, 0, SRCCOPY);
pDC->SetStretchBltMode(COLORONCOLOR);
pDC->StretchBlt(0, 0,rect.Width(),rect.Height(),&dcMemory,0, 0, bmpInfo.bmWidth, bmpInfo.bmHeight,SRCCOPY);
dcMemory.SelectObject(pOldBitmap);
ReleaseDC(pDC);
}

AddPitcure（）放在OnPaint消息函数里面，且前面需加UpdateWindow();，不然添加的位图会显示不全。