L_AnnGetUndoDepth

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnGetUndoDepth(hObject, puUsedLevels, puMaxLevels)

HANNOBJECT hObject;	/* handle to the automation object */
L_UINT *puUsedLevels;	/* address of a variable to be updated */
L_UINT *puMaxLevels;	/* address of a variable to be updated */

Retrieves the number of user actions that can be reversed using the L_AnnUndo function.

This function is available in the Document and Medical Imaging toolkits.

Parameter	Description
hObject	Handle to the automation object.
puUsedLevels	Address of a variable to be updated with the number or user actions that can be reversed using L_AnnUndo. This number will be between 0 and the number retrieved in puMaxLevels.
puMaxLevels	Address of a variable to be updated with the maximum number of user actions that can be undone using L_AnnUndo. This is the value that was set using L_AnnSetUndoDepth.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

If puUsedLevels is updated with a value of 0, no user actions can be undone using the L_AnnUndo function.

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.

Functions:	L_AnnSetUndoDepth, L_AnnUndo
Topics:	Annotation Functions: Working with the Toolbar
	Implementing Annotations
	Automated User Interface for Annotations
	Implementing an Automated Annotation Program
	Obtaining Annotation Object Information