The problem with the assembler resident program

[spyrytus]

Hello.
I'm writing assembler resident program (next TSR) and I have problem now.
I catch 16h interruption but I don't know how to catch combination of keys (eg. Ctrl+Shift+S) into this handler.
May be I do it's wrong, but I couldn't imagine it better ...
Well, If someone knows how to solve this problem - please tell me, because it's very important for me ...
Below my code (it's only handler for 16h interrupt):

;+======================================+
;|       Catch combination of keys      |
;+======================================+
INT16H_HANDLER	PROC FAR
	    pushf			;save flags
	    cmp	 ah, 10h			
	    je   @playsound		;if it's need to me - yes ! 
	    jmp  @baseirp		;no, gives it anyone
@playsound:
	    push ds			;save register
	    push dx			;save register
	    push cs			;save register
	    pop  ds			;DS must point to CS
	    call PLAYSOUND		;play music
	    pop  dx			;востанавливаем регистр
	    pop  ds			;востанавливаем регистр
	    popf			;restore flags
	    IRET			;exit from interruption
@baseirp:
	    popf			;restore flags
	    jmp  cs:OLD16H_HANDLER	;gives handler for system
;=========== Тут находятся данные
	    OLD16H_HANDLER DD	0	;address of original handler
INT16H_HANDLER	ENDP 

I use TASM 5.0 and I write for DOS.
General plan is following - program stayed in memory and if I pressed some combination of keys, will need to play some music ... All.
Program working apart from combination of keys ... :(
TIA.

[helios]

http://www.cplusplus.com/forum/general/

[spyrytus]

http://www.cplusplus.com/forum/general/

Sorry, what is it means ?
I and so write in this part of forum.

[garob]

This is a c++ forum. You will need to find an assembly forum

[spyrytus]

This is a c++ forum. You will need to find an assembly forum

Oh ... Sorry, the first I didn't understood what you written me ... :(
I'll go to assembly forum ...
Thanks ...