DAQmxReadDigitalLines Parameter

[TeckEl]

I want use the Function DAQmxReadDigitalLines, but I dont know about the Parameters and can´t find a suitable topic in help.

I set the Parameter in this order: 

DAQmxReadDigitalLines (th_in, DAQmx_Val_Auto, 10.0, DAQmx_Val_GroupByChannel, data, 1, NULL, NULL, 0);

data is an array[8] of uInt8.

The problem is that the Function doesn´t write the Input Lines into the data array.

It will be nice if someone could explain the correctly use of the parameters to me.

Thank you

[TeckEl]

I´ve found out the solution.
The Array_Size_In_Bytes must be 8 and not 1.

DAQmxReadDigitalLines (th_in, DAQmx_Val_Auto, 10.0, DAQmx_Val_GroupByChannel, data, 8, NULL, NULL, 0);

These are the correct Parameters.