Make Bezier curve path in plug in

I could get the codes to draw paths in automation plug-in with the listener log file. But some paths are not shown in it. Such as the B茅zier curve path.

I try to use the getter plug in. The fuction ''SPErr PlayGetting Work Path Info'' is to draw path. But the code like this is not work rightly.
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error = sPSActionControl-%26gt;StringIDToTypeID(''Getting Work Path Info'', %26amp;runtimeEventID);
if (error) goto returnError;

error = sPSActionControl-%26gt;Play(%26amp;result, runtimeEventID, desc00001040, plugInDialogSilent);
if (error) goto returnError;

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Could you tell me how to draw B茅zier curve path? How to used the codes from ''getter'' plug in rightly?

Please help me. Thanks a lot.

going to release