Draws the graphic specified by the Graphic parameter in the rectangle specified by the Rect parameter.procedure StretchDraw(const Rect: TRect; Graphic: TGraphic);DescriptionCall StretchDraw to draw a graphic on the canvas so that the image fits in the specified rectangle. StretchDraw calls the Draw method of the graphic. The graphic object determines how to fit into the rectangle. This may involve changing magnification and/or aspect ratio.To render the graphic in its natural size, use the Draw method, instead.If the graphic is a TBitmap object, the bitmap is rendered using the value of CopyMode.
还是用image吧
定义一个TBITMAP的对象，通过FORM的CANVAS属性肯定能做！