Dim Form on lost focus (1 Viewer)

Hi,

Need some help if possible. I have a form that displays information on a building. One of the fields on that form is the name of a person that is responsible for that building. Alongside that control is a button that opens a contact information form (over the top of the previous form).

What I want to do is dim (grey out) the main form whilst the contact form is open. And when the contact form is closed, the main form is back to normal. How can I do this?

All help is greatly appreciated

Cheers

It won't actually Dim the underlying form but the form that is being opened if it is set up as a Modal Popup form access to the underlying form cannot be done unitl the top form is closed.

David