Register and unregister type libraries

You can quickly build your own TLB Registration utility with a handful of statements, thanks to the undocumented TLBINF32.DLL library that is silently installed with Visual Basic 5 and 6. Just add a reference to the "TypeLib Information" library in the References dialog, and then invoke one of these two functions:

' Register a type library

Sub RegisterTypeLib(ByVal TypeLibFile As String)
    Dim TLI As New TLIApplication
    ' raises an error if unable to register
    ' (e.g. file not found or not a TLB)
    TLI.TypeLibInfoFromFile(TypeLibFile).Register
End Sub

' Unregister a type library

Sub UnregisterTypeLib(ByVal TypeLibFile As String)
    Dim TLI As New TLIApplication
    ' raises an error if unable to unregister
    TLI.TypeLibInfoFromFile(TypeLibFile).UnRegister
End Sub