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Use TAPI32 to dial a telephone number.

Use TAPI32 to dial a telephone number.

API Declarations


Private Const TAPIERR_NOREQUESTRECIPIENT = -2&
Private Const TAPIERR_REQUESTQUEUEFULL = -3&
Private Const TAPIERR_INVALDESTADDRESS = -4&



Rate Use TAPI32 to dial a telephone number.

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(3(3 Vote))

    Dim strBuff As String
    Dim lngResult As Long
    lngResult = tapiRequestMakeCall&(strNumber, CStr(Caption), strLocation, "")
    If lngResult <> 0 Then
        strBuff = "Error dialing number : "
        Select Case lngResult
            Case TAPIERR_NOREQUESTRECIPIENT
                strBuff = strBuff & "No Windows Telephony dialing application is running and none could be started."
            Case TAPIERR_REQUESTQUEUEFULL
                strBuff = strBuff & "The queue of pending Windows Telephony dialing requests is full."
            Case TAPIERR_INVALDESTADDRESS
                strBuff = strBuff & "The phone number is not valid."
            Case Else
                strBuff = strBuff & "Unknown error."
        End Select
        MsgBox strBuff
    End If
End Sub