This article was previously published under Q96165
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Microsoft Windows File Manager and Microsoft Windows for Workgroups FileManager both support add-on extensions.
Extensions are special dynamic-link libraries (DLLs) that can be added tothe Windows 3.1 File Manager menu or the Windows for Workgroups FileManager toolbar. To install these extensions, edit the WINFILE.INI filebased on the example listed below. The .DLL files normally reside in theWindows SYSTEM subdirectory.
To integrate Mail and File Manager utilities with File Manager, addthe ADDONS= entry in the [SETTINGS] section of the WINFILE.INI. Inaddition, add a section called [ADDONS] and the appropriate extensionsto the WINFILE.INI.WINFILE.INI:
If File Manager cannot load or set up an extension, no error messageis displayed, and File Manager removes the extension from the toolbaror menu.
These entries provide additional options on the File Manager menu ortoolbar, depending on the version of Windows you are using.
In Windows 3.1 and Windows for Workgroups 3.11, the maximum number of DLLs that you can add to File Manager is six; however, one of those DLLs must be the Undelete feature. If you do not add Undelete, the maximum number of DLLs is five.
In Windows for Workgroups 3.1, the Maximum number of DLLs that you can add to File Manager is five; however one of those DLLs must be the Undelete feature. If you do not add Undelete, the maximum numberof DLLs is four.
The .DLL files used in the above example are found in the followingproducts:
Windows for Workgroups version 3.1 Disk 7 (3.5-inch disks) Windows for Workgroups version 3.1 Disk 8 (5.25-inch disks)
Windows for Workgroups version 3.1 Resource Kit Setup and Utilities Disk
More information about File Manager extensions and developing thesetype of DLLs is available in the Microsoft Windows 3.1 SoftwareDevelopment Kit (SDK).