L_AnnUndo
#include "l_bitmap.h"
L_LTANN_API L_INT L_AnnUndo(hObject)
HANNOBJECT hObject; |
/* handle to the automation object */ |
Reverses the last user action that was executed using the automated annotation functions. This function is available in the Document/Medical Toolkits.
Parameter |
Description |
hObject |
Handle to the automation object. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
This function can be used repeatedly to reverse the number of actions specified by the L_AnnSetUndoDepth function. When the stack is empty, it returns an error.
There is only one undo depth value per root container. (Subcontainers do not have their own separate values.)
Required DLLs and Libraries
LTANN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Platforms
Windows 2000 / XP/Vista.
See Also
Example
/* This example reverses the last user action in automation mode. */ L_INT AnnUndoExample(HANNOBJECT hAutoObject)/* Automation object */ { L_INT nRet; L_UINT uUndoLevels; nRet = L_AnnGetUndoDepth(hAutoObject, &uUndoLevels, NULL); if(nRet != SUCCESS) return nRet; if(uUndoLevels) { nRet = L_AnnUndo(hAutoObject); if(nRet != SUCCESS) return nRet; } else MessageBox(NULL, TEXT("No undo operation possible!"), TEXT("Undo"), MB_OK); return SUCCESS; }