private void btnBack_Click(object sender, EventArgs e)
{
this.Hide();
DietMasterPage dm = new DietMasterPage();
dm.Show();
}
void tmr_Tick(object sender, EventArgs e)
{
//after 3 sec stop the timer
tmr.Stop();
//display mainform
DietMasterPage dm = new DietMasterPage();
dm.Show();
dm.Height = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height - 100;
dm.Width = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width - 100;
//hide this form
this.Hide();
}