ID_EDITVIEW_UNDO 39 MailEditView.cpp ON_COMMAND(ID_EDITVIEW_UNDO, OnEditviewUndo) ID_EDITVIEW_UNDO 539 MailEditView.cpp menu.EnableMenuItem(ID_EDITVIEW_UNDO, MF_ENABLED /* —LŒø */); ID_EDITVIEW_UNDO 541 MailEditView.cpp menu.EnableMenuItem(ID_EDITVIEW_UNDO, MF_GRAYED /* –³Œø */);