在该版找到一个和我相似的问题，所以也想找人帮我解答一下。拜托!
Private Sub AxPortSIPCoreLib1_InviteTrying(ByVal sender As System.Object, ByVal e As AxPORTSIPCORELIBLib._DPortSIPCoreLibEvents_InviteTryingEvent) Handles AxPortSIPCoreLib1.InviteTrying '如果呼叫方正在呼叫，将触发该事件。
        Dim i As Integer = 0
        Dim state As Boolean = False

        For i = 0 To 4           ‘五条线路
            If e.callID = CallSessions(i).GetCallID Then
                state = True
                Exit For
            End If
        Next

        If state = False Then
            Exit Sub
        End If

        CallSessions(i).SetHoldState(False)

        Dim Text As String = "Line " + CStr(i) ’添加日志
        Text = Text + ": Calling..."
        ListBoxLogs.Items.Add(Text)
    End Sub

  Private Sub AxPortSIPCoreLib1_InviteTrying(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AxPortSIPCoreLib1.RegisterFailure, AxPortSIPCoreLib1.InviteTrying
        Logined = False
        ListBoxLogs.Items.Add("Logged failed")
    End Sub

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方法“Private Sub AxPortSIPCoreLib1_InviteTrying(sender As Object, e As System.EventArgs)”无法处理事件“Public Event InviteTrying(sender As Object, e As AxPORTSIPCORELIBLib._DPortSIPCoreLibEvents_InviteTryingEvent)”，因为它们不具有相同的签名。