How to disable CAD files after you install Visio 2003 Service Pack 3 or Visio 2007 Service Pack 2

After you install Visio 2003 SP3 or Microsoft Office Visio 2007 SP2, you can disable the use of .dwg files in Visio 2003 or Visio 2007. You may want to disable .dwg files in Visio 2003 or Visio 2007 to improve the security of Visio files.

When you disable .dwg files, the following behavior occurs:

• AutoCAD Drawing (*.dwg; *.dxf) does not appear in the Files of type box in the Open dialog box
• CAD Drawing is disabled on the Insert menu.
• When you open a Visio file that contains a CAD object, the CAD object appears as a empty container. The ActiveX control on the CAD object is disabled.
• AutoCAD Drawing (*.dwg; *.dxf) does not appear in the Files of type box in the Save As dialog box.
• Convert CAD Drawings is disabled when you point to Add-ons on the Tools menu.
• Convert CAD Library is disabled when you point to Add-ons on the Tools menu.

To disable .dwg files, follow these steps:

1. Exit Visio.
2. Start Registry Editor. To do this, use one of the following methods:
   • In Windows Vista, click Start
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     , type regedit in the Start Search box, and then press ENTER.
     
     
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     If you are prompted for an administrator password or for a confirmation, type the password, or click Continue.
   • In Microsoft Windows XP, click Start, click Run, type regedit in the Open box, and then click OK.
3. Locate and then click the following registry key:
   • Visio 2003: HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Visio\Application
   • Visio 2007: HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Visio\Application
4. After you click the key that is specified in step 3, point to New on the Edit menu, and then click DWORD Value.
5. Type DisableDWG, and then press ENTER.
6. Right-click DisableDWG, and then click Modify.
7. In the Value data box, type 1, and then click OK.
8. On the File menu, click Exit to exit Registry Editor.