L_INT LAutomation::Undo (dwFlags=0);
Undoes the last automation operation performed in the active automation container.
Reserved for future use. Must be 0.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
LAutomation::Undo must be called at least once in order to perform a "redo" using LAutomation::Redo.
To determine the current undo level call LAutomation::GetUndoLevel.
To change the undo level call LAutomation::SetUndoLevel.
To determine whether an automation operation can be undone, call LAutomation::CanUndo.
For information about grouping multiple operations into a single undo process, refer to LAutomation::AddUndoNode.
Required DLLs and Libraries
This example shows how to undo the last automation operation.
L_INT LAutomation_UndoExample(LAutomation &lauto)
nRet = lauto.IsValid ();
if ( nRet == SUCCESS ) /* check the validity of the automation handle */
L_BOOL fCanUndo ;
/* Query the ability of undoing */
fCanUndo = lauto.CanUndo () ;
if ( fCanUndo )
/* undo the last automation operation */
nRet = lauto.Undo () ;
if(nRet != SUCCESS)
return SUCCESS ;