>I would like to write a file to the Windows system directory after the expiry date of the demo which should disable my application (limited time demo version). Is there a way of finding out the name of the Windows system directory?

Rene,

Here's the declaration and how to use it:

DECLARE INTEGER GetSystemDirectory IN Win32API;
  STRING @c_ReturnBuffer, INTEGER n_BufferSize
lcbuffer = SPACE(265)
lnbufflen = LEN(lcbuffer)
lnbufflen = GetSystemDirectory(@lcbuffer, lnbufflen)
IF lnbufflen > 0
  lcbuffer = LEFT(lcbuffer, lnbufflen)
ENDIF

hth,