Inheritance: System.Windows.Forms.Form
 private void 修改密码PToolStripMenuItem_Click(object sender, EventArgs e)
 {
     frmPassword fm = new frmPassword();
     fm.ShowDialog();
     fm.Close();
 }
 private void button2_Click(object sender, EventArgs e)
 {
     frmPassword fm = new frmPassword();
     this.Close();
 }