Description
Tests whether Undo can reverse the most recent edit in the editable control over the current row and column.
Applies to
Syntax
PowerBuilder
boolean dwcontrol.CanUndo ( )
Return value
Returns true if the last edit can be reversed (undone) using the Undo method and false if the last edit cannot be reversed.
If dwcontrol is null, the method returns null.
Usage
PowerBuilder environment
For use with other PowerBuilder controls, see the section called “CanUndo” in PowerScript Reference.
Examples
These statements check to see if the last edit in the edit control of dw_contact can be reversed; if yes the statements reverse it, and if no they display a message:
IF dw_contact.CanUndo() THEN
dw_contact.Undo()
ELSE
MessageBox(Parent.Title, "Nothing to Undo")
END IFSee also
