Determines whether or not the last automation operation in the class object's container can be undone.
|TRUE||An undo can be performed.|
|FALSE||An undo cannot be performed.|
To undo an automation operation, call LRasterPaintWindow::Undo.
The default number of undo operations that can be undone within the class object's container is 16.
LRasterPaintWindow::Initialize must be called before calling this function.
For an example, refer to LRasterPaintWindow::Undo.