private void pb_Maximize_Click(object sender, EventArgs e)
{
if (this.WindowState == FormWindowState.Maximized)
{
this.WindowState = FormWindowState.Normal;
this.toolTip1.SetToolTip(this.pb_Maximize, "Maximize");
}
else
{
this.WindowState = FormWindowState.Maximized;
this.toolTip1.SetToolTip(this.pb_Maximize, "Restore Down");
}
}