Mouse Wheel events not fired

[Fernando Nadal Martínez]

Hi all,

I work with Delphi 5.

I need to update an application to respond to mouse wheel events over
a custom graphic control (derived from TGraphicControl).

I have read and tested all the ways proposed on the forums but doesn´t
work:

* TForm.OnMouseWheel
* TApplicationEvents.OnMessage

In both, any mouse wheel messaged or events are fired.

If I start a new application the events works.

If I clear the form (no code, no events, only the controls of the GUI)
and try the 2 ways propsed on the forums also doesn't work.

Is there any known interference or bug with others standar VCL
controls that I use in the same form?
Any advide, please?

Regards,
Fernando Nadal.