VB.Net'te bir control'e tooltip eklemek

Private myToolTip As ToolTip
myToolTip = New ToolTip()
myToolTip.SetToolTip(Button1, "My Tooltip Text")

DataGridView'de Header Kısmına ComboBox Eklemek

Form_Load(........
    Dim rect As Rectangle = DataGridView1.GetCellDisplayRectangle(3, -1, True)
    'cbVolumeOrder, datagridview üzerinde göstermek istediğimiz combobox ımız
    cbVolumeOrder.Location = New Point(rect.Location.X + 60, rect.Location.Y + 15)
    DataGridView1.Controls.Add(cbVolumeOrder)

Textbox içine sadece alphanumeric karakterler girilmesini sağlayan kod.

Private Sub textBox_KeyPress(........
   Dim cInvalidChars() As Char = {"~", "`", "!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "_", "-", "=", "+", "{", "[", "}", "]", "|", "\", ":", ";", """", "'", "<", ",", ">", ".", "?", "/"}
   Dim result As Boolean = False
   result = cInvalidChars.Contains(e.KeyChar)
   If result Then
          e.Handled = True
   End If
End Sub

DataGridView de bir hücreye odaklanmak.

DataGridView1.CurrentCell = DataGridView1.Item("ColumnName", rowIndex)


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