RegExpr adds regular expressions support to Visual Basic 6.0 and VBA - Windows Demo $99. RegExpr for VB/VBA adds regular expressions support to Visual Basic 6.0 and VBA. To use regular expressions as if they were a built in language feature of VB or VBA, you need RegExpr. It is a source code module that is fully compatible with Visual Basic 5.0 and 6.0 and Office VBA.