Stores cached information about a control that has been inserted into an Microsoft Office document; allows additional controls to be added in less time; in Microsoft Office 2000, the EXD files are stored in the following folders: Excel8.0 Ppt9.0 Word8.0 Vbe EXD files are created when a user inserts an ActiveX control into a document using the Control Toolbox in a Microsoft Office program. They are also created when any type of control is inserted into a custom UserForm in the Microsoft Visual Basic Editor.