How to display tooltip that vary from cell to cell in the WinForms GridControl?

//declaring ToolTip
private System.Windows.Forms.ToolTip toolTip1;
private int hooverRow = -1;
private int hooverCol = -1;
private void Form1_Load(object sender, EventArgs e)
{
   //Initialize the tip with desired timing parameters
   this.toolTip1 = new System.Windows.Forms.ToolTip();
   toolTip1.InitialDelay = 500; //Half a second delay
   toolTip1.ReshowDelay = 0;
}

'declaring ToolTip
Private toolTip1 As System.Windows.Forms.ToolTip
Private hooverRow As Integer = -1
Private hooverCol As Integer = -1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
   'Initialize the tip with desired timing parameters
   Me.toolTip1 = New System.Windows.Forms.ToolTip()
   toolTip1.InitialDelay = 500 'Half a second delay
   toolTip1.ReshowDelay = 0
End Sub

private void gridControl1_MouseMove(object sender, MouseEventArgs e)
{
   int row, col;
   if(this.gridControl1.PointToRowCol(new Point(e.X, e.Y), out row, out col)
&& (col != hooverCol || row != hooverRow))
   {
      hooverCol = col;
      hooverRow = row;
      if(this.toolTip1 != null && this.toolTip1.Active)
        this.toolTip1.Active = false; //Turn it off
      this.toolTip1.SetToolTip(this.gridControl1, string.Format("tooltip: row {0}, column {1}", hooverRow, hooverCol));
      this.toolTip1.Active = true; //Make it active so it can show
   }
}

Private Sub gridControl1_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs)
Dim row, col As Integer
   If Me.gridControl1.PointToRowCol(New Point(e.X, e.Y), row, col) AndAlso (col <> hooverCol OrElse row <> hooverRow) Then
     hooverCol = col
     hooverRow = row
     If Me.toolTip1 IsNot Nothing AndAlso Me.toolTip1.Active Then
       Me.toolTip1.Active = False 'Turn it off
     End If
     Me.toolTip1.SetToolTip(Me.gridControl1, String.Format("tooltip: row {0}, column {1}", hooverRow, hooverCol))
     Me.toolTip1.Active = True 'Make it active so it can show
   End If
End Sub