private void mnuMaterials_Click(object sender, EventArgs e)
 {
     if (frmMaterials == null)
     {
         frmMaterials             = new frmDefaultImage();
         frmMaterials.FormClosed += new FormClosedEventHandler(frmMaterials_FormClosed);
         frmMaterials.MdiParent   = this;
         frmMaterials.Show();
     }
 }
        private void frmMaterials_FormClosed(object sender, FormClosedEventArgs e)
        {
            frmMaterials.Dispose();
            frmMaterials = null;

            frmCompanySettings             = new SettingPage();
            frmCompanySettings.FormClosed += new FormClosedEventHandler(frmCompanySettings_FormClosed);
            frmCompanySettings.MdiParent   = this;
            frmCompanySettings.Show();
        }
 private void frmLogin_FormClosed(object sender, FormClosedEventArgs e)
 {
     frmLogin.Dispose();
     //this.Show();
     frmMaterials             = new frmDefaultImage();
     frmMaterials.FormClosed += new FormClosedEventHandler(frmMaterials_FormClosed);
     frmMaterials.Show();
     //if (!(this.ActiveMdiChild == null))
     //{
     //    foreach (Form form in this.MdiChildren)
     //    {
     //        if ((form.Name == "Users"))
     //        {
     //            form.Activate();
     //            return;
     //        }
     //    }
     //}
     //Users home = new Users();
     //home.MdiParent = this;
     //home.Show();
 }