[Mono-list] Want to use mouse wheel to alter scale of a drawing

[alanb]

Help please anyone. I am using a drawing area widget in monodevelop to
display some lines. I have a slider set up rescale the drawing but want to
also use the mouse wheel but am getting nowhere. (I am new to Gtksharp). I
tried connecting the ButtonPressEvent but the handler doesnt run when I move
the mouse wheel. Can anyone point me to an example that shows me how to do
this. Is there a MouseWheel event it doesnt appear in the list of signals
for the drawing area widget? Do I have to place the drawing area in an event
box?

Thanks  Alan
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