Using existing dialog boxes

With NXOpen is it possible to use an existing dialog box and then add some more functionality?

For instance, I would like to create a program that shows the 'Offset Curve in Face' dialog and then when the user selects 'OK' the program creates the offset curve and then the offset curve is used to create a 'Law Extension'.

Is it possible to call the 'Offset Curve in Face' dialog box from an NXOpen program or do I need to create my own using the Block UI Styler?

Thanks,
Dennis