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POHow to prevent a control from changing Z order?
 

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  1. POHow to prevent a control from changing Z order?
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    <p>I have user control in .Net where I use a hit test in WndProc to allow resizing it in runtime with the mouse.</p> <p>The problem is that after the hit test succedes (mouse press, drag to resize, mouse release) the control jumps upwards in the Z order and ruins it position in the form.</p> <p>I need the hit test since it's a very customized control.</p> <p>Is there a way in WndProc to stop the control from changing it's Z order ?</p> <p>Thanks.</p> <p>The hit test code:</p> <pre><code>protected override void WndProc(ref Message m) { if (!DesignMode &amp;&amp; Sizeable &amp;&amp; (m.Msg == Win32Wrapper.WM_NCHITTEST)) { Point Hit = new Point((int)m.LParam &amp; 0xFFFF, (int)m.LParam &gt;&gt; 16); Hit = this.PointToClient(Hit); int DistToBorder = 5; if (Hit.X &lt; DistToBorder) { if (Hit.Y &lt; DistToBorder) { m.Result = (IntPtr)Win32Wrapper.HTTOPLEFT; return; } if (Hit.Y &gt; this.ClientRectangle.Bottom - DistToBorder) { m.Result = (IntPtr)Win32Wrapper.HTBOTTOMLEFT; return; } m.Result = (IntPtr)Win32Wrapper.HTLEFT; return; } else if (Hit.X &gt; ClientRectangle.Right - DistToBorder) { if (Hit.Y &lt; DistToBorder) { m.Result = (IntPtr)Win32Wrapper.HTTOPRIGHT; return; } else if (Hit.Y &gt; this.ClientRectangle.Bottom - DistToBorder) { m.Result = (IntPtr)Win32Wrapper.HTBOTTOMRIGHT; return; } m.Result = (IntPtr)Win32Wrapper.HTRIGHT; return; } else if (Hit.Y &lt; DistToBorder) { m.Result = (IntPtr)Win32Wrapper.HTTOP; return; } else if (Hit.Y &gt; this.ClientRectangle.Bottom - DistToBorder) { m.Result = (IntPtr)Win32Wrapper.HTBOTTOM; return; } } </code></pre>
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