Declare Function tapiRequestMakeCall Lib "tapi32.dll" _
(ByVal stNumber As String, ByVal stDummy1 As String, _
ByVal stDummy2 As String, ByVal stDummy3 As String) As Long
Sub DialNumber(Number As String)
Dim lngStatus As Long
lngStatus = tapiRequestMakeCall(Number, "", "", "")
If lngStatus < 0 Then
MsgBox "Failed to dial number " & Number, vbExclamation
End If
End Sub