[Lazarus] Shift returns empty set in MouseWheel events

[Ondrej Pokorny]

On 02.08.2016 23:16, Wolf wrote:
> Can you tell me in which unit I might look for the bug to originate?

Study how it's done for OnMouseMove and do the same.

> And, once I have fixed it, what procedures should I follow to have the 
> patch accepted?

http://wiki.freepascal.org/Creating_A_Patch
http://wiki.freepascal.org/How_do_I_create_a_bug_report

Ondrej