>I am using ADIR to get a specific number of files from a directory based on a criteria. So, ADIR(laFile,gcFat+'thread\*.*') will create an array and I can now use ALEN(laFile,1) to get the file count. However, on big directory this is causing a big array to be created just to get the number of files. How can I optimize that?

lnFiles=adir(laFile,gcFat+'thread\*.*'), e.g. adir returns number of files.

Too bad, you don't have Help installed...