private void cmdAdd_Click(object sender, EventArgs e)
 {
     if (dt.Rows.Count > 0)
     {
         MessageBox.Show("Data Perusahaan sudah ada, tidak bisa ditambah");
         return;
     }
     Master.frmPerusahaan ifrmChild = new Master.frmPerusahaan(this);
     ifrmChild.MdiParent = Program.MainForm;
     Program.MainForm.RegisterChild(ifrmChild);
     ifrmChild.Show();
 }
 private void cmdEdit_Click(object sender, EventArgs e)
 {
     if (gvPerusahaan.SelectedCells.Count > 0)
     {
         Guid _RowID = new Guid(Tools.isNull(gvPerusahaan.SelectedCells[0].OwningRow.Cells["RowID"].Value, Guid.Empty).ToString());
         Master.frmPerusahaan ifrmChild = new Master.frmPerusahaan(this, _RowID);
         ifrmChild.MdiParent = Program.MainForm;
         Program.MainForm.RegisterChild(ifrmChild);
         ifrmChild.Show();
     }
     else
     {
         MessageBox.Show(Messages.Error.RowNotSelected);
     }
 }