FXTreeList scrolling

I have a FXScrollWindow with a FXHorizontalFrame. The first child
is a FXVerticalFrame contains a bunch of FXCheckButton and the
second child is a FXTreeList. The FXTreeList is always fully
expanded so the items match up with the check boxes.

 

The problem I have is in scrolling. When I hover the mouse over
the checkboxes of over the scrollbar I can scroll with the mouse.
However, when the mouse is over the treelist the scrolling does
not work.

 

I tried disabling scrolling in the treelist, thinking it would
pass it up the chain, but it does not work. Then I tried to catch
the SEL_MOUSEWHEEL event for the treelist and handle it there but
I can't capture the SEL_MOUSEWHEEL event from the treelist.

 

Any ideas?

 

Kind regards,

 

js

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