private void changePasswordToolStripMenuItem_Click_1(object sender, EventArgs e)
{
change_password frm = new change_password();
frm.MdiParent = this;
frm.Show();
}
private void btnChange_Click(object sender, EventArgs e)
{
panelMDI.Controls.Clear();
panelMDI.Visible = true;
change_password change = new change_password();
change.TopLevel = false;
change.AutoScroll = true;
panelMDI.Controls.Add(change);
change.Dock = DockStyle.Fill;
change.Show();
pictureBox1.Visible = true;
pictureBox1.Height = btnChange.Height;
pictureBox1.Top = btnChange.Top;
}