HRESULT OnToolChangeBlockRegion( IIntsCollection* BlocksToChange, IRegion* NewRegion, VARIANT_BOOL* Cancel );
void OnToolChangeBlockRegion( IIntsCollection BlocksToChange, IRegion NewRegion, out bool Cancel );
Sub OnToolChangeBlockRegion( _ BlocksToChange As IIntsCollection, _ _ NewRegion As IRegion, _ ByRef Cancel As Boolean _ )
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