BUG: Macro Processing Error?

Well I've been learning the macro sintaxis for the last 2 weeks, and can't find a workaround for this problem. I define a constant with a value, depending the value of this constant I define some macros in my include files, here is the code:

Code:

format PE GUI 4.0
entry start

UNICODE EQU     TRUE

include '%fasminc%164\win32w.inc'

The win32w.inc is:

Code:

; Win32 programming headers (WideChar)
include 'macro/struct.inc'
include 'macro/proc32.inc'
include 'macro/com32.inc'
include 'macro/import32.inc'
include 'macro/export.inc'
include 'macro/resource.inc'

struc CHAR val { match any, val \{ . du val \}
                 match , val \{ . du ? \} }

include 'equates/kernel32.inc'
include 'equates/user32.inc'
include 'equates/gdi32.inc'
include 'equates/comctl32.inc'     ;<--- My modified include
include 'equates/comdlg32.inc'
include 'equates/shell32.inc'
include 'equates/wsock32.inc'

at the top of the comctl32.inc I've put this code to define or not the constant for a correct process, but It acts randomly with errors.
The code:

Code:

IF ~defined UNICODE
        display "UNICODE not defined,defining as FALSE",0Dh,0Ah
        match any,UNICODE {UNICODE      EQU        FALSE}
;        match ,UNICODE {UNICODE      EQU        FALSE}
END IF

match =FALSE ,UNICODE {display "UNICODE defined as FALSE",0Dh,0Ah}
match =TRUE  ,UNICODE {display "UNICODE defined as TRUE",0Dh,0Ah} 

WM_MESSAGEA = 100
WM_MESSAGEW = 200
IF UNICODE
WM_MESSAGE = WM_MESSAGEW
ELSE
WM_MESSAGE = WM_MESSAGEA
END IF

I've used "match any", and "match ", but they works fine only once, then I must change from one to the other,It's crazy!!!.

Try with that sequence:
1. Use "match any" and copile, without defining UNICODE [OK]
2. Define UNICODE as TRUE and copile, during the copilation it says that UNICODE is defined as false, not as TRUE!!! this is one error. [ERROR]
3. Now use "match " and copile, now it says that UNICODE is defined as TRUE, works fine!!! [OK]
4. Copile again, but without defining UNICODE, it shows an error when i use UNICODE, it's not defined!!! [ERROR]

I've tried to give you all the sequence, why does it happen? i need help.
Thanx in advance.