将拖动行为添加到FormBorderStyle设置为None的表单中
问题描述：
可能重复：
C＃-使无边界表单可移动吗？
如果我将表单的 FormBorderStyle 设置为 None ，则会丢失表单的拖动行为，这与预期的一样。
If I set my form's FormBorderStyle to None, I lose the drag behavior of the form, as expected.
我在表单顶部添加了一个自定义栏，我希望它保持这种状态，现在可以将表单保持在此模式下并具有（或写入）拖动行为？
I've added a custom bar to the top of my form and I like it to stay that way, now is it possible to keep the form in this mode and have (or write) drag behavior?
如果可能的话，我应该怎么做。我真的希望找到一个是的，可能的答案。：）
If it's possible, how should I do so. I really hope to find a Yes it's possible answer. :)
答
private const Int32 WM_NCHITTEST = 0x84;
private const Int32 HTCLIENT = 0x1;
private const Int32 HTCAPTION = 0x2;
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_NCHITTEST)
{
base.WndProc(ref m);
if ((Int32)m.Result == HTCLIENT)
m.Result = (IntPtr)HTCAPTION;
return;
}
base.WndProc(ref m);
}