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<P>hi,</P>
<P>I need help on using the calldata parameter of vtkCommand of virtual void
Execute (vtkObject *caller, unsigned long eventId, void *callData). </P>
<P>Using the addobserver() I could not figure out how to package and pass
data to the Execute() function. Only InvokeEvent has the option to pass
callData but it directly triggers the action and does not allow to observe
the event.</P>
<P>thanx,</P>
<P>Ugur BOZKAYA</P></FONT><BR />
<BR />
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