What is a .EXD file?
The .EXD file extension stands for Control Information Cache File. These files are important because they keep saved information about special features, called controls, that you can add to Microsoft Office documents. Think of controls as tools or buttons that do specific tasks in your document, like a calendar picker or a checkbox.
When you use Microsoft Office and add one of these controls to your document, the program saves some details about it in an .EXD file. This is really helpful because if you want to add more controls later, the program can do it faster since it remembers some of the information in the .EXD file. It's like keeping a little memory of how the control works so it doesn't have to learn it all over again next time.
In Microsoft Office 2000, these .EXD files are kept in special folders named Excel8.0, Ppt9.0, Word8.0, and Vbe, depending on which part of Office you're using (like Excel, PowerPoint, Word, or the Visual Basic Editor).
You create an .EXD file without even knowing it when you insert an ActiveX control (a type of control that makes documents more interactive) into a document using something called the Control Toolbox in Microsoft Office. They are also made when you add any kind of control to a custom UserForm in the Microsoft Visual Basic Editor, which is a tool for more advanced document customization.
To open and work with .EXD files, you can use programs like Microsoft Word 365, Microsoft Excel 365, Microsoft PowerPoint 365, and Microsoft Visual Studio 2022 or newer versions of these programs. These applications understand the .EXD file format and can manage the controls stored in these files, allowing you to customize your documents in more advanced ways.
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