If you want to apply your function to only a subset of datasets present in the active folder, you can replace the argument of the folders Objects() property. E.g. your datasets all have names of a specific pattern (like 2014_11_xx_07_yy denoting a measurement from a november day starting a 7 o’clock) you may use a regular expression (“^2014_11_\d{2}_07_\d{2}\.DAT$”) to filter out the desired selection.

More on regular expressions can be found in the Online Help in the chapter Automating Processes > Automation Using FlexPro Visual Basic > FlexPro Visual Basic Reference > Objects and Collections > F > Folder > Properties > Objects.