regsvr [reg or unreg] [filename or wildcard] {log file}

Register or unregister DLL/OCX files.
In the first parameter, specify "reg" for registering files, or "unreg" for unregistering files.
In the second parameter, you can specify a single file that you want to register or unregister, or multiple files, by using wildcard.
The third parameter is optional, and specifies a log filename for saving the results of the registering operation.
Examples:
regsvr reg "f:\winnt\system32\fv*.ocx" "c:\temp\log1.txt"
regsvr unreg "f:\winnt\system32\ab*.dll"