It is use for a control panel and for a dialog box PURPOSE:

Control Panel : A display-only form can be used as a centralized ENTRY point from which users CHOOSE the tasks they want to accomplish. When a form is used in this way, it is referred to as a control panel. A control panel might include tasks encompassing a variety of functional areas such as Help Desks, Employee Services, and Asset Tracking. Users select a functional AREA from the main control panel and fill in data on the form related to the specific task.

Dialog boxes: require user interaction and are useful when you want to:

• Prompt users for confirmation.
• Implement a main-detail (or parent-child) relationship between forms where users can edit the main form using a details dialog box.
• Reuse a form in a variety of ways.
• Embed a table that lists options from which users can choose.
• Provide a way for users to edit or VIEW a rarely used set of fields, and thus avoid cluttering the main form.
• Provide a way for users to view or edit a set of fields that handle complex calculations of multiple components.

It is use for a control panel and for a dialog box purpose:

Control Panel : A display-only form can be used as a centralized entry point from which users choose the tasks they want to accomplish. When a form is used in this way, it is referred to as a control panel. A control panel might include tasks encompassing a variety of functional areas such as Help Desks, Employee Services, and Asset Tracking. Users select a functional area from the main control panel and fill in data on the form related to the specific task.

Dialog boxes: require user interaction and are useful when you want to: