undo RichEdit1

//undo RichEdit1 

//undo
RichEdit1.Perform(EM_UNDO,0,0);

//检查是否允许撤消
Undo1.Enabled:=RichEdit.Perform(EM_CANUNDO,0,0)<>0;




posted @ 2012-05-31 08:25  XE2011  阅读(93)  评论(0)  编辑  收藏  举报