Shawn,

>I placed a label on one of my forms which has a page frame, which is inherited from mmMaintenanceForm and i tried to selected the option for ControlID for the new Label added on the second page.

>When clicking on the "..." button i get the following error.

>Title : Application Error
>Message : An Application Configuration File Could Not Be Found.
>
>with an okay button.
>I clicked okay then i Get
>
>Title : Microsoft Development Environment
>Message : Object Reference not set to an instance of an object.
>
>with an okay button

Is this the first time you've tried to set a Contro ID? Do you have an app.config file in your project?

Regards,