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PONot receiving WM_NCMBUTTONDOWN on title bar
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  1. PONot receiving WM_NCMBUTTONDOWN on title bar
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    copied!<p>I am trying to create a mechanism to allow the user to right click and drag on a toolbar in order to move a window...</p> <p>This is proving very difficult:</p> <p>I am currently not receiving the HTCAPTION event which I have seen a really helpful post for already!</p> <p><a href="https://stackoverflow.com/questions/3631831/not-receiving-wm-nchittest-on-title-bar">Not receiving WM_NCHitTest on title bar</a></p> <p>The suggestion/alternative here is to use the WMNCMouseMove and inspect the HitTest to see if it is the caption.. So naively I assumed that I could extend this idea to use the WMNCMButtonDown (instead) to take me one step closer!</p> <p>If this worked then I could get the type of click i.e. left, right, middle, double or single! This would have then allow me to somehow tell windows that I want this to be recognised as a drag event.</p> <p>The trouble is that I never receive the WM_NCMBUTTONDOW:</p> <pre><code>void __fastcall TForm1::Dispatch( void* message ) { switch ( static_cast&lt;TMessage*&gt;( message )-&gt;Msg ) { case WM_NCHITTEST: { TWMNCHitTest &amp;Message = *static_cast&lt;TWMNCHitTest*&gt;( message ); WMNCHitTest( Message ); break; } case WM_NCMOUSEMOVE: { TWMNCMouseMove &amp;Message = *static_cast&lt;TWMNCMouseMove*&gt;( message ); WMNCMouseMove( Message ); break; } case WM_NCMBUTTONDOWN: { TWMNCMButtonDown &amp;Message = *static_cast&lt;TWMNCMouseMove*&gt;( message ); WMNCMButtonDown(Message); break; } default: { TForm::Dispatch(message); break; } } } </code></pre> <p>oes anybody have any ideas??</p> <p>It is worth noting that I do in fact receive the other types of messages (WM_NCHITTEST &amp;&amp; WM_NCMOUSEMOVE) so the mechanism is working correctly.</p> <p>Please any ideas would be much appreciated!!</p> <p>Thanks,</p> <p>Joe</p>
 

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