CanUndo Method

8.7C, PLBCMP GUI Only

The CanUndo method determines whether there are any actions in an EDITTEXT, EDITNUMBER, or RICHEDITTEXT object's undo queue. The method uses the following format:

Where:

label

Optional. A Program Execution Label.

object

Required. An EDITTEXT, EDITNUMBER or RICHEDITTEXT object that is accessed.

return

Optional. A Numeric Variable that indicates the status of the queue.

Flags Affected: EOS, OVER, ZERO

Note the following:

1. If the value returned is zero, the ZERO condition flag is set.

2. The OVER and EOS Condition Flags are always cleared.

3. A return value of zero (0) indicates no undo actions exist in the queue.

4. When using the PL/B Web Server, this method is not supported.

See Also: Method Syntax, EDITTEXT Methods, EDITNUMBER Methods, RICHEDITTEXT Methods