How to control the visibility of a PMP textbox on the fly.

Hi 'Experts',

This is a API / VB question with regards to PropertyManagerPage Contols and their dynamic visibility

I've been working on a rather massive Addin to be able to generate processing instructions for a C&C machine.   So far getting data out has worked, but now my challenge is the real-estate of the PropertyManagerPage controls and the 'enter this only when you do that'.

What I would like to do is enable visibility of some controls when I check or uncheck a Checkbox control.

I know I can make a group 'expand / unexpand' and that I can set a contol's visibility while I create it with Addcontrol.

In particular I would like to do the same type of function as appears to be available with the 'Property Tab Builder' in the advanced option (right side / bottom half)

Any help would be greatly appreciated.

SolidworksApi macros