dial.frm

vb精彩编程希望大家有用

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   2475
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4110
   LinkTopic       =   "Form1"
   ScaleHeight     =   2475
   ScaleWidth      =   4110
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "退出"
      Height          =   495
      Left            =   2160
      TabIndex        =   3
      Top             =   1560
      Width           =   975
   End
   Begin VB.CommandButton Command1 
      Caption         =   "拨号"
      Enabled         =   0   'False
      Height          =   495
      Left            =   600
      TabIndex        =   2
      Top             =   1560
      Width           =   975
   End
   Begin VB.TextBox Text1 
      Height          =   375
      Left            =   360
      TabIndex        =   1
      Top             =   840
      Width           =   3375
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Caption         =   "电话话码："
      Height          =   180
      Left            =   360
      TabIndex        =   0
      Top             =   480
      Width           =   900
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'API函数声明
Option Explicit
Private Declare Function tapiRequestMakeCall& Lib "TAPI32.DLL" _
    (ByVal destaddress$, ByVal appname$, ByVal calledparty$, ByVal comment$)
Private Const TAPIERR_NOREQUESTRECIPIENT = -2&
Private Const TAPIERR_REQUESTQUEUEFULL = -3&
Private Const TAPIERR_INVALDESTADDRESS = -4&

Private Sub Command1_Click()
    Dim buff As String
    Dim nresult As Long
    nresult = tapiRequestMakeCall&(Trim$(Text1.Text), CStr(Caption), "Test Dial", "")
    If nresult <> 0 Then
        buff = "拨号错误："
        Select Case nresult
        Case TAPIERR_NOREQUESTRECIPIENT
            buff = buff & "No Windows Telephony dialing application is running and none could be started."
        Case TAPIERR_REQUESTQUEUEFULL
            buff = buff & "The queue of pending Windows Telephony dialing requests is full."
        Case TAPIERR_INVALDESTADDRESS
            buff = buff & "The phone number is not valid"
        Case Else
            buff = buff & "Unknown error."
        End Select
    End If
End Sub

Private Sub Command2_Click()
    Unload Me
End Sub

Private Sub Form_Load()
    Move (Screen.Width - Width) \ 2, (Screen.Height - Height) \ 2
End Sub

Private Sub Text1_Change()
    Command1.Enabled = Len(Trim$(Text1.Text)) > 0
End Sub