『求助』大侠们帮我看看!非常感谢

我是新手,想学习matlab,呵呵,刚刚学就碰到一点问题,问一下!
clear
FigWin=figure('Position',[50,50,800,600],'Name','个人','NumberTitle','off','menubar','none');
wen=uimenu(gcf,'label','文件');
uimenu(wen,'label','打开','call','??????');
uimenu(wen,'label','保存','call','??????')
uimenu(wen,'label','退出','call','close(gcf)','separator','on');



我想问一下,"打开"后面的问号,call应该怎么写?
还有"保存"后的,谢谢喽!