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        private void btnAdvance_Click(object sender, EventArgs e)

        {

            if (!gbAdvance.Visible)

            {

                gbAdvance.Visible = true;

                this.Height = ht + gbAdvance.Height;

                btnAdvance.Text = "隐藏高级选项(&H)";

            }

            else

            {

                gbAdvance.Visible = false;

                this.Height = ht;

                btnAdvance.Text = "显示高级选项(&S)";

            }

        }

        private void 窗体名称_Load(object sender, EventArgs e)

        {

            ht=gbContents.Height + panControls.Height+SystemInformation.CaptionHeight+SystemInformation.BorderSize.Height*2;

            this.Height = ht;

        }

完成效果如图所示：