Relative To

Data Type:	int32
Description:	Specifies the point in the buffer at which to write data. If you also specify an offset with Offset, the write operation begins at that offset relative to this point you select with this property.

Valid values

DAQmx_Val_FirstSample	10424	Write samples relative to the first sample.
DAQmx_Val_CurrWritePos	10430	Write samples relative to the current position in the buffer.