IPicture* ppic = NULL;
HRESULT hr;
hr = OleLoadPicturePath((CComBSTR)picpath.GetBuffer(),(LPUNKNOWN)NULL,0,0,IID_IPicture,(LPVOID*)&ppic);
if (SUCCEEDED(hr))
{
(CStatic*)(ctrlpwnd)->ModifyStyle(0xF,SS_BITMAP|SS_CENTERIMAGE);
CDC* pdc = ctrlpwnd->GetDC();
CRect rect;
ctrlpwnd->GetWindowRect(&rect);
pwnd->ScreenToClient(&rect);
OLE_XPOS_HIMETRIC xSrc = 0; // 图片中当前显示区域的x
OLE_YPOS_HIMETRIC ySrc = 0; // 图片中当前显示区域的y
OLE_XSIZE_HIMETRIC cxSrc = rect.Width(); // 图片中当前显示区域的宽度
OLE_YSIZE_HIMETRIC cySrc = rect.Height(); // 图片中当前显示区域的高度
ppic->get_Width(&cxSrc);
ppic->get_Height(&cySrc);
(ppic->Render(*pdc,0,0,rect.Width(),rect.Height(),0,cySrc,cxSrc,-cySrc,&rect));
ppic->Release();
pwnd->ReleaseDC(pdc);
ppic = NULL;
可以加载 jpg，bmp。
IPicture::Render简介
HRESULT Render( HDC hdc, //Handle of device context on which to render the image
long x, //Horizontal position of image in hdc
long y, //Vertical position of image in hdc
long cx, //Horizontal dimension of destination rectangle
long cy, //Vertical dimension of destination rectangle
OLE_XPOS_HIMETRIC xSrc, //Horizontal offset in source picture
OLE_YPOS_HIMETRIC ySrc, //Vertical offset in source picture
OLE_XSIZE_HIMETRIC cxSrc, //Amount to copy horizontally in source picture
OLE_YSIZE_HIMETRIC cySrc, //Amount to copy vertically in source picture
LPCRECT prcWBounds //Pointer to position ）
x,y,cx,cy分别是指在屏幕上显示的左上角和右下角；
xsrc,ysrc,cxsrc,cysrc分别是指图片的大小，所以屏幕上长宽的比例和图片长宽的比例是一样的。
有一点令人不解 0,hmHeight,hmWidth,-hmHeight对应于xsrc,ysrc,cxsrc,cysrc，并不是以0,0开头。（否则图片的方向会错误）
prcWBounds 一般赋值为NULL。