{C} > set | find "PATHEXT"
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;

{C} > dir /b \usr\bin\crapps.pl
crapps.pl

{C} > crapps
'crapps' is not recognized as an internal or external command, operable program or batch file.

{C} >