From Help file:

Places information about files into an array and then returns the number of files.


ADIR(ArrayName [, cFileSkeleton [, cAttribute [, nFlag]]])

3rd and 4th parameter probably unneeded in your case, as file won't be hidden or directory,
but explained in detail in help file

llFound = adir(laTmp, "*.doc")>0 && including pathname works as well as setting path

>set path to home(c:\global"
>
>if adir(*.doc)>0 fie is found
>ct=1
>endif
>
>if ct is 1 the file is found
>
>Am I correct