Detect that mouse cursor is over the title bar
lazarus / 31-LCL

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CM630 · 2021-08-05 07:52

How am I to detect that the mouse cursor is over the title bar of the
form?
The OnMouseMove event is not triggered when the mouse is over the
title bar.
So I thought I could detect OnMouseMove for the entire OS, but I have
found a Windows-only solution.
In the worst case, I can place a timer that will check the position of
the mouse let say every 150 ms, but probably that is not the best way.

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CM630 · 2021-08-23 12:02

Thanks.
1. It did not compile at first until I added types in the uses
section.
2. Procedure Tform1.WMNCMouseMove(var msg:TLmessage); fires when the
mouse cursor is over the title bar or over the borders of the form.
3. Procedure TForm1.WMMouseMove(Var msg:TLmessage); fires when I am
somewhere else on the form.

So it is still not exactly what I need. I will read some more...