INF UnregisterDlls directive
Caution
Starting in Windows 11 version 22H2, a driver package using this directive is no longer eligible for a signature from Hardware Developer Center.
Universal driver packages and Windows Drivers cannot use this directive.
An UnregisterDlls directive references one or more INF sections used to specify files that are OLE controls and require self-unregistration (self-removal).
[DDInstall]
UnregisterDlls=unregister-dll-section[,unregister-dll-section]...
Each INF section referenced by an UnregisterDlls directive must have the following entry format:
[unregister-dll-section]
dirid,[subdir],filename,registration-flags[,[timeout][,argument]]
An unregister-dll-section can have any number of entries, each on a separate line.
Entries
dirid
Specifies the destination directory ID of the file to be unregistered. For more information, see Using Dirids.
subdir
Specifies the directory path, relative to the current directory, to the file to be unregistered. If not specified, the file is in the current directory.
filename
Identifies the file name of the OLE control to be unregistered.
registration-flags
Indicates the registration operations to perform on the OLE control. One or both of the following flags must be specified.
0x00000001 (FLG_REGSVR_DLLREGISTER)
Call the DllUnRegisterServer function (described in the Windows SDK documentation).
0x00000002 (FLG_REGSVR_DLLINSTALL)
Call the OLE control's DllInstall function (described in the Windows SDK documentation).
timeout
Specifies the time-out, in units of seconds, for an OLE Control to complete the specified unregistration calls. The default time-out is 60 seconds.
argument
If the control is an executable file, this is a command string that is passed to the executable. The default argument is /UnRegServer.
If the control is not an executable file, this specifies the command-line argument to pass to the DllInstall function.
Remarks
Each unregister-dll-section name must be unique to the INF file and must follow the general rules for defining section names. For more information about these rules, see General Syntax Rules for INF Files.
For more information about OLE controls and self unregistration, see the Windows SDK documentation.
Examples
[Dialer]
RegisterDlls = DialerRegSvr
[DialerUninstall]
UnregisterDlls = DialerRegSvr
[DialerRegSvr]
11,,avtapi.dll, 1