Dim WorkPortName As String
Dim WorkDCB As CommStateDCB

Sub UpdateDialogSettings (Index As Integer)
    
    For i% = 0 To 5
        If WorkDCB.BaudRate = Val(Baud_Rate_Opt(i%).caption) Then
            Baud_Rate_Opt(i%).value = TRUE
        End If
    Next i%

    Parity_Opt(Asc(WorkDCB.Parity)).value = TRUE
    Data_Bits_Opt(Asc(WorkDCB.ByteSize) - 4).value = TRUE
    Stop_bits_Opt(Asc(WorkDCB.StopBits)).value = TRUE

End Sub

Sub Comm_Device_Opt_Click (Index As Integer)

    WorkDCB.Id = Chr$(Index)
    
    WorkPortName = Comm_Device_Opt(Index).caption + ":"

    UpdateDialogSettings (Index)
    DisplayQBOpen WorkDCB, WorkPortName, CommRBBuffer, CommTBBuffer, CommReadInterval

End Sub

Sub Cancel_Cmmd_Click ()
    Unload PortDlg
End Sub

Sub Reset_Cmmd_Click ()
    
    WorkDCB = CommState
    UpdatePortDlg

End Sub

Sub Ok_Cmmd_Click ()

    If CommDeviceNum > 0 And CommHandle > -1 Then

        NoChange = TRUE

        If CommState.BaudRate <> WorkDCB.BaudRate Then NoChange = FALSE
        If CommState.Parity <> WorkDCB.Parity Then NoChange = FALSE
        If CommState.StopBits <> WorkDCB.StopBits Then NoChange = FALSE
        If CommState.ByteSize <> WorkDCB.ByteSize Then NoChange = FALSE

        If NoChange = TRUE Then
            Unload PortDlg
            Exit Sub
        End If

        UpdateCaption " DIALOG: Change Active Settings (Yes), Post-Pone (No), Return to Dialog (Cancel)", 0
        
        Result% = MsgBox("Port Already Active!" + Chr$(13) + "Activate settings Now?", 3 + 16 + 256, "Terminal Sampler II - Port Active")
    
        Select Case Result%
            Case 6
                UpdateCaption " Changing Port Settings LIVE!", 0
                
                CommState = WorkDCB
                PostState = WorkDCB

                CommPortName = WorkPortName
                PostPortName = WorkPortName

                ApiErr% = SetCommState(WorkDCB)
                Unload PortDlg
            Case 7
                UpdateCaption " Settings Post-Poned until next CONNECT", 0
                PostState = WorkDCB
                PostPortName = WorkPortName
                Unload PortDlg
            Case Else
                DisplayQBOpen WorkDCB, WorkPortName, CommRBBuffer, CommTBBuffer, CommReadInterval
        End Select

    Else

        CommState = WorkDCB
        PostState = WorkDCB

        CommPortName = WorkPortName
        PostPortName = WorkPortName
        Unload PortDlg

    End If

End Sub

Sub Parity_Opt_Click (Index As Integer)

    If WorkDCB.Parity <> Chr$(Index) Then
        
        WorkDCB.Parity = Chr$(Index)
        DisplayQBOpen WorkDCB, WorkPortName, CommRBBuffer, CommTBBuffer, CommReadInterval

    End If

End Sub

Sub Data_Bits_Opt_Click (Index As Integer)

    If WorkDCB.ByteSize <> Chr$(Index + 4) Then

        WorkDCB.ByteSize = Chr$(Index + 4)
        DisplayQBOpen WorkDCB, WorkPortName, CommRBBuffer, CommTBBuffer, CommReadInterval
    
    End If

End Sub

Sub Baud_Rate_Opt_Click (Index As Integer)
    
    If WorkDCB.BaudRate <> Val(Baud_Rate_Opt(Index).caption) Then
        WorkDCB.BaudRate = Val(Baud_Rate_Opt(Index).caption)
        DisplayQBOpen WorkDCB, WorkPortName, CommRBBuffer, CommTBBuffer, CommReadInterval
    End If

End Sub

Sub Stop_Bits_Opt_Click (Index As Integer)

    If WorkDCB.StopBits <> Chr$(Index) Then
        
        WorkDCB.StopBits = Chr$(Index)
        DisplayQBOpen WorkDCB, WorkPortName, CommRBBuffer, CommTBBuffer, CommReadInterval

    End If

End Sub


Sub Form_Load ()

    Remove_Items_From_SysMenu PortDlg

    WorkDCB = CommState
    WorkPortName = CommPortName

    UpdatePortDlg

    CenterDialog PortDlg

End Sub

Sub UpdatePortDlg ()
    
    For i% = 1 To 0 Step -1
        ApiErr% = OpenComm(Comm_Device_Opt(i%).caption + ":", 2048, 2048)
        Select Case ApiErr%
            Case IE_HARDWARE, IE_OPEN
                Comm_Device_Opt(i%).enabled = FALSE
            Case Else
                ApiErr% = CloseComm(ApiErr%)
                Comm_Device_Opt(i%).enabled = TRUE
                Last% = i%
        End Select
        Comm_Device_Opt(i%).value = FALSE
    Next i%

    If CommDeviceNum > 0 And CommHandle > -1 Then
        Last% = CommDeviceNum - 1
        Comm_Device_Opt(Last%).value = TRUE
    Else
        Comm_Device_Opt(Last%).value = TRUE
    End If
    
    WorkDCB.Id = Chr$(Last%)
    WorkPortName = Comm_Device_Opt(Last%).caption + ":"

End Sub