private void btnbrand_Click(object sender, EventArgs e)
{
frmBrandList frmBrand = new frmBrandList();
frmBrand.TopLevel = false;
MainPanel.Controls.Add(frmBrand);
frmBrand.BringToFront();
frmBrand.Show();
}
private void btnbrand_Click(object sender, EventArgs e)
{
btnbrand.Enabled = false;
ReferenceFrm.Dispose();
ReferenceBtn.Enabled = true;
frmBrandList frmBrand = new frmBrandList();
ReferenceFrm = frmBrand;
ReferenceBtn = btnbrand;
frmBrand.TopLevel = false;
MainPanel.Controls.Add(frmBrand);
frmBrand.BringToFront();
frmBrand.Show();
}