you can use
CellContentClick
event in datagridview
private void grdFclick_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if(bool.Parse(grdFclick.Rows[e.RowIndex].Cells[0].EditedFormattedValue.ToString()))
{
string val = grdFclick.Rows[e.RowIndex].Cells[1].Value.ToString();
}
}