Render Region / Render Actives Objects

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On 02/06/2003 at 11:13, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   8.100 
Platform:   Windows  ;   
Language(s) :     C++  ;

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Hi,
how can I find out if the user has choosen RenderRegion/Render Active Objects. I tried it with RDATA_ACTIVEOBJECTSONLY but that isn't working and I don't find the command for Render Region and the choosen coordinates for Render Region.
Thanks
Cathleen