[Lazarus] How to handle WM_MOUSEWHEEL?

Sven Barth pascaldragon at googlemail.com
Tue Nov 2 13:42:13 CET 2010

Am 01.11.2010 22:31, schrieb And3mD:
> Hello
> I want to do some mouse scrolling control without focus.
> So I need handle WM_MOUSEWHEEL by myself. This message is not always
> caught by window WndProc.
> In Delphi simply you can do that in TApplication.OnMessage().
> In Lazarus i found only TApplication.OnUserInput but there is only
> message type in parameters (Sender: TObject;Msg: Cardinal).
> How should I handle WM_MOUSEWHEEL in Lazarus?

You might want to take a look here: 

I'm using that approach successfully on Windows Mobile.


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