pwSaveState

 pwSaveState

 Saves the current state so that pwUndo will restore
 the current state.

 Attention: Some functions use internally pwSaveState.
 pwUndo will only restore the state when pwSaveState was called
 the last time, independent of a user or internal function call.

 If you want to be sure that a working state is saved,
 then use pwSaveRepository to save it to harddisk and reload it
 with pwLoadRepository if neccessary.