PML Customisation
User Guide
Using PML in AVEVA Products : Using PML in AVEVA E3D™ : Undo and Redo
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Using the MARKDB / ENDMARKDB commands. The syntax is as follows:
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By creating a PML undoable object and adding it to the undo stack. See the Software Customisation Reference Manual for a fuller description of this object. You should create an undoable object, set up the undo and redo execution strings, and then call the method add() to mark the database and add the undoable to the undo stack. Make the database changes, and then call the method endUndoable().
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Additionally you may register to be informed whenever an undo or redo operation has taken place, using the PML PostEvents object. See the Software Customisation Reference Manual for a fuller description of this object.
