# C1.Win.FlexGrid.C1FlexGridBase.MouseEnterCell ## Content

MouseEnterCell Event

Fires when the mouse enters a cell.

Namespace: C1.Win.FlexGrid
Assembly: C1.Win.FlexGrid.10.dll
Syntax
public event RowColEventHandler MouseEnterCell
Public Event MouseEnterCell As RowColEventHandler
Returns
Type Description
RowColEventHandler Fires when the mouse enters a cell.
Remarks

Many applications track mouse movement and react to the cell that is currently under the mouse. This can be done using the MouseMove event, but that is not very efficient since the event fires many times while the mouse is over the same cell.

The MouseEnterCell event allows you to implement cell tracking efficiently, since it only fires once until the mouse leaves the cell.

Examples

The code below tracks mouse movement and highlights the cell under the mouse:

void Form1_Load(object sender, EventArgs e)
{
  // create style for tracking cell under the mouse
  CellStyle cs = _flex.Styles.Add("track");
  cs.BackColor = Color.Gold;
}
void _flex_MouseEnterCell(object sender, RowColEventArgs e)
{
  // apply tracking style when mouse enters the cell
  _flex.SetCellStyle(e.Row, e.Col, _flex.Styles["track"]);
}
void _flex_MouseLeaveCell(object sender, RowColEventArgs e)
{
  // remove tracking style when mouse leaves the cell
  _flex.SetCellStyle(e.Row, e.Col, (CellStyle)null);
}