Charlie,

>The reason I'm using VFP is the data collected will go into a database and be used for analysis. There are only a few non-traditional VFP tasks required. If I can get past them, it will be nice product.

It sounds like what you really want to be storing is just the raw value of seconds() or better yet the system level datetime value which has a resolution of 1ms, but in VFP we can't see that level of accuracy in a datetime data type. If you get the clock value from an API call and do a little bit of code in C++ then you could get access to the additional data from VFP.

Every datapoint should just be stored with the raw time the sample was taken. You can derive elapsed time between samples by subtracting the times.