Optional parameters must specify a default value

Optional parameters must provide default values that can be used if no parameter is supplied by a calling procedure.

Error ID: BC30812

To correct this error

• Specify default values for optional parameters; for example:

  Sub Proc1(ByVal X As Integer, _
        Optional ByVal Y As String = "Default Value")
     MsgBox("Default argument is: " & Y)
  End Sub
  

See Also

Concepts

Procedure Declaration for Visual Basic 6.0 Users

Reference

Optional (Visual Basic)