Kix32 myscript.kix $Varname="This is the value"

Kix32 myscript.kix --f:"this is the file path"

$aTemp = GetCommandLine(1)  ; command line as array.
; elements 0 and 1 are "kix32.exe" and the script name, so start with 2.
For $X = 2 to UBound($aTemp)
  If InStr($aTemp[$X], '--f:')        ; found the filespec directive
    $FileSpec = SubStr($aTemp[$X], 5) ; position 5 and beyond is the filespec value
  EndIf
Next