Data Module designer
The Data Module design window is a visual design surface for designing data modules that you can use in your forms, reports, and labels. Drag and drop the data access components you need for your data module, then set their properties in the Inspector.
Note
To read about a Data Access component, select it with the mouse, and then click the Question Mark button in the toolbar.
Tools available in this designer are
Component palette (with a Data Access page)
Inspector for setting properties and writing event handlers and other methods
Alignment toolbar for aligning objects
Method menu
Status bar to show you your location on the design surface and the selected object in the order in which you added it.
To switch between the Source editor and the Design window, press F12.
Data modules are saved with a .DMD extension. They are not runnable by themselves.