我用API调整图像大小,见下
StretchBlt(picHolder.hdc, 0, 0, nWidth, nHeight, hPic.hdc, 0, 0, sWidth, sHeight, ScrCopy)但执行后不会在picHolder中显示调整后的图片,why?
StretchBlt(picHolder.hdc, 0, 0, nWidth, nHeight, hPic.hdc, 0, 0, sWidth, sHeight, ScrCopy)但执行后不会在picHolder中显示调整后的图片,why?
autoredraw=true?