Re: OnExpose in ActiveX

[david(at)dfanning.com (David Fanning)]

Bert Bierman writes:
 
> I ran into a problem which I hope someone can give me a hint:
> 
> I use the IDLDrawWidget with Visual Basic.
> In the IDL-procedure I create a surface with SurfaceShade and PolyShade,
> and display this in the IDLDrawWidget.
> 
> Because I want to manipulate the image I played around with the 
> RegisterForEvents to set who is handling the mouse-events
> (VB or IDL).
> 
> If you set "forward expose events" the image is no longer
> displayed?? But the button-processing is perfect.
> I guess the expose-event does not reach the IDL and the image
> is not actually displayed. I looked for an expose-function to
> trgger from VB like the ...->draw.... in object graphics but could 
> not find it.
> 
> Does someone know how this can be done?

I would guess you haven't turned EXPOSE events
on for the draw widget, therefore they are not
being generated:

   drawid = Widget_Draw(baseID, ...., Expose_Events=1)

Cheers,

David 

-- 
David Fanning, Ph.D.
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