MFC---static控件加載圖片

                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;  // 圖片中當前顯示區域的x
			OLE_YPOS_HIMETRIC ySrc  = 0;  // 圖片中當前顯示區域的y
			OLE_XSIZE_HIMETRIC cxSrc = rect.Width(); // 圖片中當前顯示區域的寬度
			OLE_YSIZE_HIMETRIC cySrc = rect.Height(); // 圖片中當前顯示區域的高度
			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;

可以加載 jpg，bmp。

IPicture::Render簡介

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分別是指在屏幕上顯示的左上角和右下角；

xsrc,ysrc,cxsrc,cysrc分別是指圖片的大小，所以屏幕上長寬的比例和圖片長寬的比例是一樣的。

有一點令人不解 0,hmHeight,hmWidth,-hmHeight對應於xsrc,ysrc,cxsrc,cysrc，並不是以0,0開頭。（否則圖片的方向會錯誤）

prcWBounds 一般賦值為NULL。