Methods, computer systems and computer readable media for receiving designing and displaying device and platform-specific forms are provided. In embodiments, base forms are utilized and modified to create custom forms that are platform and device specific, without breaking the parent-child relationship between the base form and the custom form for any non-modified characteristics of the base form. Custom forms enhance the performance and appearance. In embodiments, interrogators are executed at runtime to specify a set of instructions that will be executed, further enhancing the performance and appearance associated with the form and the particular device displaying the form. In various embodiments of the present invention, user interfaces provide the designer visual representations of the forms as they appear on selected platforms and/or devices.