private void fpSpread1_CellClick(object sender, FarPoint.Win.Spread.CellClickEventArgs e)
{
if(e.Button == MouseButtons.Left && e.ColumnHeader == false && e.RowHeader == false)
{
fpSpread1.ActiveSheet.Cells[e.Row, e.Column].BackColor = Color.Yellow;
}
else if (e.Button == MouseButtons.Right)
{
e.Cancel = true;
}
}