View source for DevHelp ResetTimer

{{DISPLAYTITLE:DevHelp_ResetTimer}}
This service removes a timer handler for the physical device driver.

==Syntax==
===C===
 USHORT APIENTRY DevHelp_ResetTimer( NPFN TimerHandler );

===Assembler===
<PRE>
MOV   AX,Offset cs:timer_handler     ; Offset to timer handler
MOV   DL,DevHlp_ResetTimer

CALL  [Device_Help]
</PRE>

==Parameters==
===C===
;TimerHandler (NPFN): Offset to timer handler

===Assembler===
 MOV   AX,Offset cs:timer_handler     ; Offset to timer handler

==Return Code==
Success Indicator: Clear if successful.

Possible errors: Invalid handler if carry flag is set.

===Assembler===
<PRE>
'C' Clear if successful.

   'C' Set if error.
       AX = Error code.
            Possible errors:
               Invalid handler if carry flag is set.
</PRE>

==Remarks==
ResetTimer removes a timer handler from the list of timer handlers. Timer handlers are analogous to the user timer interrupt (INT 1Ch). Refer to TickCount for a discussion of timer handlers.

DS should be set to the data segment of the physical device driver. If the physical device driver issued a call to PhysToVirt referencing the DS register, the physical device driver will restore DS to the original value.

==Example Code==
===C===
<PRE>
#include  "dhcalls.h"

USHORT APIENTRY DevHelp_ResetTimer( NPFN TimerHandler );
</PRE>

[[Category:DevHlps]]