Hi,

im trying to open com2 . whene i clicked on Button Open_com2 the com 2 must be open but i have some problem like the following
1- Type 'IO.Ports.SerialPort' is not defined.
2-'Ports' is not a member of 'IO'.


Can anyone tell me how can I solve this?
please help me i got headache

this all my code i use Visual Studio 2003

VB Code:
  1. Public Class Form1

  2.     Inherits System.Windows.Forms.Form

  3.  
  4. #Region " Windows Form Designer generated code "

  5.  
  6.     Public Sub New()

  7.         MyBase.New()

  8.  
  9.         'This call is required by the Windows Form Designer.

  10.         InitializeComponent()

  11.  
  12.         'Add any initialization after the InitializeComponent() call

  13.  
  14.     End Sub

  15.  
  16.     'Form overrides dispose to clean up the component list.

  17.     Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

  18.         If disposing Then

  19.             If Not (components Is Nothing) Then

  20.                 components.Dispose()

  21.             End If

  22.         End If

  23.         MyBase.Dispose(disposing)

  24.     End Sub

  25.  
  26.     'Required by the Windows Form Designer

  27.     Private components As System.ComponentModel.IContainer

  28.  
  29.     'NOTE: The following procedure is required by the Windows Form Designer

  30.     'It can be modified using the Windows Form Designer.  

  31.     'Do not modify it using the code editor.

  32.     Friend WithEvents open_com2 As System.Windows.Forms.Button

  33.     <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

  34.         Me.open_com2 = New System.Windows.Forms.Button

  35.         Me.SuspendLayout()

  36.         '

  37.         'open_com2

  38.         '

  39.         Me.open_com2.Location = New System.Drawing.Point(56, 88)

  40.         Me.open_com2.Name = "open_com2"

  41.         Me.open_com2.Size = New System.Drawing.Size(184, 64)

  42.         Me.open_com2.TabIndex = 0

  43.         Me.open_com2.Text = "Open Com2"

  44.         '

  45.         'Form1

  46.         '

  47.         Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)

  48.         Me.ClientSize = New System.Drawing.Size(292, 266)

  49.         Me.Controls.Add(Me.open_com2)

  50.         Me.Name = "Form1"

  51.         Me.Text = "Form1"

  52.         Me.ResumeLayout(False)

  53.  
  54.     End Sub

  55.  
  56. #End Region

  57.  
  58.     Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles open_com2.Click

  59.  
  60.  
  61.         'usually, you would declare the serial port at form level and initialize

  62.         'it in the constructor so you can get responses from the port

  63.  
  64.         'declare the serial port and set it for 4800,N,8,1

  65.         Dim serial As New IO.Ports.SerialPort("COM2")

  66.         serial.BaudRate = 4800

  67.         serial.Parity = IO.Ports.Parity.None

  68.         serial.DataBits = 8

  69.         serial.StopBits = IO.Ports.StopBits.One

  70.  
  71.          'make sure the port is open

  72.         Try

  73.             If Not serial.IsOpen Then serial.Open()

  74.         Catch ex As Exception

  75.             'specifically an UnauthorizedAccessException

  76.             'the port is already open somewhere else

  77.             MessageBox.Show("The port is already opened by another process.")

  78.             Exit Sub

  79.         End Try

  80.  
  81.        '

  82.         'uncomment the next line if you do not need to get responses

  83.         'and you are done with the port

  84.         'serial.Close() 

  85.  
  86.     End Sub

  87. End Class

  88. '