I am having problems creating a custom validator control.<BR><BR>I have a popup calendar (already a control) that need to act as a required fields validator control. <BR><BR>I have all these fields on my page and if any of them are filled in or updated user MUST select a date. <BR><BR>The problem I'm having is I would like to have this calendar to act the same way as RequiredFieldValidator control, where you can select FieldToValidate via dropdown in the Properties window inside visual studio. <BR><BR>I am not sure how to achieve that dropdown list of available form fields and add this as one of my control properties.<BR><BR>Any suggestions???