Scripting

Try this

Option Explicit
Dim wshShell
On Error Resume Next
   Set wshShell = WScript.CreateObject("WSCript.shell")
   If Err.Number <> 0 Then
      Wscript.Quit
   End If
   wshShell.Run "cmd.exe /C cd C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727 & Regasm c:\temp\BARB2.EdxWebServiceClient.dll /tlb BARB2.EdxWebServiceClient.tlb /codebase"
On Error Goto 0

Registering a DLL located in 'C:\TEMP' ranks right up there in the pantheon of Really Bad Ideas!

And does *nobody* know how to use Google? Jeeeeez...

Aside from the location of the DLL specified (I hope it was just filler for the real path), is there any specific reason that the script has to change the directory before executing the command?  Why not simply run the command with the full path like this:

 C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Regasm.exe c:\temp\BARB2.EdxWebServiceClient.dll /tlb BARB2.EdxWebServiceClient.tlb /codebase