DevExpress / Grid Control - Make columns in Run Time

private void makeGridView(GridControl gc, int rowCount)
{

DataTable dt = new DataTable();
dt.Columns.Add("STAGE NO.");
dt.Columns.Add("작업상태");
dt.Columns.Add("타입");
dt.Columns.Add("프로세스");
dt.Columns.Add("STEP");
dt.Columns.Add("TRAY ID");

string channel = string.Empty;

for (int i = 0; i < rowCount; i++)
{

channel = (i + 1).ToString();

dt.Rows.Add(new string[] { channel, "-", "-", "-", "-", "-" });

}

gc.DataSource = dt;

}