C#

 public static void CompileRooms()
        {

            try
            {
                frmTimetablePopup objfrmTimetablePopup = (frmTimetablePopup)Application.OpenForms["frmTimetablePopup"];
                DataGridView grd = new DataGridView();
                grd.Location = new Point(310, 200);
                grd.Size = new System.Drawing.Size(300, 200);
                DataGridViewTextBoxColumn grdCol = new DataGridViewTextBoxColumn();
                grdCol.HeaderText = "Days";
                grdCol.Name = "Col1";
                grdCol.Width = 50;
                grdCol.DefaultCellStyle.BackColor = Color.CornflowerBlue;
                grd.Columns.Add(grdCol);
                objfrmTimetablePopup.Controls.Add(grd);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
}