I've developed an application that has a main form at the bottom of the screen with command buttons as a custom menu. This is not an MDI application. All forms are shown off this form as modal forms.

However, now I would like to have one of the buttons always active. For example, this button may be used to toggle to another application, so I want the user to be able to press it at any time. But, the other menu buttons should remain disabled.

I thought I saw some API calls that allowed the button to be pressed at any time while the application was active but cannot find the code.

Any ideas?

Thanks,
Greg