[عبدالله الدوسري]

كود :

   Private WithEvents DGV_AutoNumber As DataGridViewTextBoxColumn
   Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
       ' DGV_AutoNumber
       Me.DGV_AutoNumber = New System.Windows.Forms.DataGridViewTextBoxColumn()
       Me.DGV_AutoNumber.HeaderText = "م"
       Me.DGV_AutoNumber.Name = "DGV_AutoNumber"
       Me.DataGridView1.Columns.AddRange(New System.Windows.Forms.DataGridViewColumn() {Me.DGV_AutoNumber})
       Me.DGV_AutoNumber.DisplayIndex = 0
   End Sub

   Private Sub DataGridView1_CellFormatting(sender As Object, e As DataGridViewCellFormattingEventArgs) Handles DataGridView1.CellFormatting
       If e.ColumnIndex = Me.DGV_AutoNumber.Index Then
           e.Value = e.RowIndex + 1
       End If
   End Sub