private void frmChucNang_Load(object sender, EventArgs e)
{
frmThueDia f = new frmThueDia();
f.TopLevel = false;
pnMain.Controls.Add(f);
f.Dock = DockStyle.Fill;
f.Show();
}
private void menuThueDia_Click(object sender, EventArgs e)
{
pnMain.Controls.Clear();
frmThueDia f = new frmThueDia();
f.TopLevel = false;
pnMain.Controls.Add(f);
f.Dock = DockStyle.Fill;
f.Show();
}
