check if dir exists

Hi,
what should i do to check if a directory exists on my filesystem?

i included
!include "FileFunc.nsh"

and i check the dir in this way:

Section "main" SEC01

...

${DirState} "C:\Documents and Settings" $R0

...

SectionEnd

but i get this error:
Invalid command: ${DirState}

why? thx

add this to your code below the include statement:

!insertmacro DirState

This 'announces' the marco you want to use.

xiris

or just use:

IfFileExists c:\DIRECTORY\*.*