LAutomation::Undo
#include "ltwrappr.h"
L_INT LAutomation::Undo (dwFlags=0);
L_UINT32 dwFlags; |
/* reserved */ |
Undoes the last automation operation performed in the active automation container.
Parameter |
Description |
dwFlags |
Reserved for future use. Must be 0. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
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
LTAUT For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application |
See Also
Functions: |
LAutomation::CanUndo, LAutomation::GetUndoLevel, LAutomation::SetUndoLevel |
Topics: |
Example
This example shows how to undo the last automation operation.
L_INT LAutomation_UndoExample(LAutomation &lauto) { L_INT nRet; 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 nRet; } } else { return nRet; } return SUCCESS ; }