static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
fmDN = new fmDangNhap();
Application.Run(fmDN);
}
private void btnDangnhap_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
Form fm = this.CheckExists(typeof(fmDangNhap));
if (fm != null)
{
fm.Activate();
}
else
{
fmDangNhap f = new fmDangNhap();
f.MdiParent = this;
f.Show();
}
}