How to make WebDAV work in read-write in Office?

For Office 2010:

1. Click Start, click Run, type regedit in the Start search box, and then click OK.
2. Locate and then right-click the following registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Common\Internet
3. Point to New, and then click DWORD Value.
4. Type OpenDocumentsReadWriteWhileBrowsing, and then press ENTER.
5. Right-click OpenDocumentsReadWriteWhileBrowsing, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. On the File menu, click Exit to quit Registry Editor.

For Office 2013 use HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Common\Internet