private void 中级自测题SToolStripMenuItem_Click(object sender, EventArgs e)
{
this.IsMdiContainer = true; //将mainform窗体设置为父窗体
this.label1.Visible = false; //隐藏父窗体上的标题文字；
this.pictureBox1.Visible = false; //隐藏父窗体上的标题文字
this.label2.Visible = false; //隐藏父窗体上的版权文本
SecondaryExmForm SFrm = new SecondaryExmForm();
SFrm.MdiParent = this;
SFrm.Show();
}
private void SecondaryExmForm_FormClosing(object sender, FormClosingEventArgs e)
{
//注：\n表示文本换行
if (MessageBox.Show(this, "确定要关闭当前窗体吗？是请点击‘确定’\n按钮，否则，请点击‘取消’按钮。", "提示",
MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
{
SecondaryExmForm SFrm = new SecondaryExmForm();
SFrm.Close();
}
else
{
e.Cancel = true;
}
}