LAutomation::Undo

#include "ltwrappr.h"

L_INT LAutomation::Undo (dwFlags=0);

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

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 ; 
}

Help Version 19.0.2017.10.27

LEADTOOLS Container and Automation C++ Class Library Help

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Classes and Member Functions

Functions:	LAutomation::CanUndo, LAutomation::GetUndoLevel, LAutomation::SetUndoLevel
Topics:	Undoing and Redoing Automation Operations