How to get the highest internal base clock using c++?

[David_Lin]

I would like to get the highest internal base clock supported by a DAQ card, for example, 80MHz for PCI-6251, 100MHz for PCIe6361. What function should I use? I have tried DAQmxGetSampClkTimebaseRate and DAQmxGetCICtrTimebaseSrc, but they both return default value, which is 20MHz.

[KateB]

int32 __CFUNC DAQmxGetDevCIMaxTimebase(const char device[], float64 *data);

[David_Lin]

It works. Thanks.