private void frm_login_Load(object sender, EventArgs e)
{
HelperClass.CenterToScreen(this);
labhint.Text = "For Test:" + Environment.NewLine +
"user name: admin " + Environment.NewLine +
"password: F4S48Oe2cC" + Environment.NewLine +
"user role : adminstration" + Environment.NewLine +
"--------------------------" + Environment.NewLine +
"user name: user" + Environment.NewLine +
"password: F4S48Oe2cC" + Environment.NewLine +
"user role : Nrmal user";
}