例子程序是《Windows环境下32位汇编语言》第六章的程序，
Timer.asm源码如下：
.386
.model flat,stdcall
option casemap :none
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
; Include 文件定义
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
include windows.inc
include user32.inc
includelib user32.lib
include kernel32.inc
includelib kernel32.lib
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
ID_TIMER1 equ 1
ID_TIMER2 equ 2
ICO_1 equ 1
ICO_2 equ 2
DLG_MAIN equ 1
IDC_SETICON equ 100
IDC_COUNT equ 101
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
; 数据段
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.data?
hInstance dd ?
hWinMain dd ?
dwCount dd ?
idTimer dd ?
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; 代码段
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.code
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; 定时器过程
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_ProcTimer proc _hWnd,uMsg,_idEvent,_dwTime
pushad
invoke GetDlgItemInt,hWinMain,IDC_COUNT,NULL,FALSE
inc eax
invoke SetDlgItemInt,hWinMain,IDC_COUNT,eax,FALSE
popad
ret
_ProcTimer endp
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; 窗口过程
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_ProcDlgMain proc uses ebx edi esi,hWnd,uMsg,wParam,lParam
mov eax,uMsg
;**************************************************
.if eax == WM_TIMER
mov eax,wParam
.if eax == ID_TIMER1
inc dwCount
mov eax,dwCount
and eax,1
inc eax
invoke LoadIcon,hInstance,eax
invoke SendDlgItemMessage,hWnd,\
IDC_SETICON,STM_SETIMAGE,\
IMAGE_ICON,eax
.elseif eax == ID_TIMER2
invoke MessageBeep, -1
.endif
;**************************************************
.elseif eax == WM_INITDIALOG
push hWnd
pop hWinMain
invoke SetTimer,hWnd,ID_TIMER1,250,NULL
invoke SetTimer,hWnd,ID_TIMER2,2000,NULL
invoke SetTimer,NULL,NULL,1000,addr _ProcTimer
mov idTimer,eax
;**************************************************
.elseif eax == WM_CLOSE
invoke KillTimer,hWnd,ID_TIMER1