This demo for beginners shows you how to use the Open and SaveAs Common Dialog to open files( in this case, picture files) and save them with a different extension.是什么意思_This demo for beginners shows you how to use the Open and SaveAs Common Dialog to open files( in this case, picture files) and save them with a different extension.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句