我写了WndProc
可移动控件的方法如下:
protected override void WndProc(ref Message m)
{
const int WM_NCHITTEST = 0x0084;
if (m.Msg == WM_NCHITTEST)
{
base.WndProc(ref m);
if ((int)m.Result == 0x1)
m.Result = (IntPtr)0x2;
return;
}
base.WndProc(ref m);
}
并设置SizeAll
光标为光标属性。但是当我们像我一样设置 m.Result 时,光标将是Default
任何状况之下。我能怎么做?
你应该处理WM_SETCURSOR
too.
您可能还想处理WM_NCLBUTTONDBLCLK
防止双击时控件最大化:
protected override void WndProc(ref Message m)
{
const int WM_NCHITTEST = 0x84;
const int WM_SETCURSOR = 0x20;
const int WM_NCLBUTTONDBLCLK = 0xA3;
const int HTCAPTION = 0x2;
if (m.Msg == WM_NCHITTEST)
{
base.WndProc(ref m);
m.Result = (IntPtr)HTCAPTION;
return;
}
if (m.Msg == WM_SETCURSOR)
{
if ((m.LParam.ToInt32() & 0xffff) == HTCAPTION)
{
Cursor.Current = Cursors.SizeAll;
m.Result = (IntPtr)1;
return;
}
}
if ((m.Msg == WM_NCLBUTTONDBLCLK))
{
m.Result = (IntPtr)1;
return;
}
base.WndProc(ref m);
}
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