Traks visibility in F-Curve

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On 10/02/2007 at 08:46, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   10 
Platform:   Windows  ;   
Language(s) :     C++  ;

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From where do I know that the particular track is visible in the F-Curve?
I tried to use "GetNBit" function and checked all bits

    
    
    NBIT_TL1_FOLD, NBIT_TL1_TDRAW, NBIT_TL1_FOLDTR etc

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But I not found any solution.
bit "NBIT_TL1_SELECT2" works somehow, but this bit and all other bits fault to detect is track is not visible due to "Link View To Object Mahager" option is ON, and object not selected in AM.
...
Is the way to detect is option "Link View To Object Mahager" is ON or OFF ?