private void TestMoreWindows_Load(object sender, EventArgs e)
{
TestForm1 t1 = new TestForm1();
t1.MdiParent = this;
t1.Show();
TestForm1 t2 = new TestForm1();
t2.MdiParent = this;
t2.Show();
}
//切换到窗口1
private void button1_Click(object sender, EventArgs e)
{
Form fo = FindMdiChildren("TestForm1");
if (fo != null)
{
fo.Show();
}
else
{
fo = new TestForm1();
fo.MdiParent = this;
fo.Show();
}
fo.Activate();
}