CanUndo() Method
Reports the value indicating wether it is possible to perform the Undo operation.
Syntax
bool CanUndo()
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also