相信大家都是从不懂到懂的成长过来的，所以恳请大牛们给与我迷惑的地方指点一二，小弟不胜感激。以前看一些论坛说新手提问大牛不想回答因为太基础了，这点我也明白，所以遇到问题第一是求助于百度，google，可是有些问题不好查，不知从何查起，还是希望您能体谅一下新手。
这是一段代码（windowsPE权威指南）：
.386
.model flat,stdcall
option casemap:none
include windows.inc
include user32.inc
includelib user32.lib
include kernel32.inc
includelib kernel32.lib
include comdlg32.inc
includelib comdlg32.lib
ICO_MAIN equ 1000
DLG_MAIN equ 1000
IDC_INFO equ 1001
IDM_MAIN equ 2000
IDM_OPEN equ 2001
IDM_EXIT equ 2002
IDM_1 equ 4000
IDM_2 equ 4001
IDM_3 equ 4002
.data
hInstance dd ?
hRichEdit dd ?
hWinMain dd ?
hWinEdit dd ?
szFileName db MAX_PATH dup(?)
.const
szDllEdit db 'RichEd20.dll',0
szClassEdit db 'RichEdit20A',0
szFont db '宋体',0
.code
;----------------
;初始化窗口程序
;----------------
_init proc
local @stCf:CHARFORMAT
invoke GetDlgItem,hWinMain,IDC_INFO
mov hWinEdit,eax
invoke LoadIcon,hInstance,ICO_MAIN
invoke SendMessage,hWinMain,WM_SETICON,ICON_BIG,eax ;为窗口设置图标
invoke SendMessage,hWinEdit,EM_SETTEXTMODE,TM_PLAINTEXT,0 ;设置编辑控件
invoke RtlZeroMemory,addr @stCf,sizeof @stCf
mov @stCf.cbSize,sizeof @stCf
mov @stCf.yHeight,9*20
mov @stCf.dwMask,CFM_FACE or CFM_SIZE or CFM_BOLD
invoke lstrcpy,addr @stCf.szFaceName,addr szFont
invoke SendMessage,hWinEdit,EM_SETCHARFORMAT,0,addr @stCf
invoke SendMessage,hWinEdit,EM_EXLIMITTEXT,0,-1
ret
_init endp
;-------------------
; 窗口程序
;-------------------
_ProcDlgMain proc uses ebx edi esi hWnd,wMsg,wParam,lParam
mov eax,wMsg
.if eax==WM_CLOSE
invoke EndDialog,hWnd,NULL
.elseif eax==WM_INITDIALOG ;初始化
push hWnd
pop hWinMain
call _init
.elseif eax==WM_COMMAND ;菜单
mov eax,wParam
.if eax==IDM_EXIT ;退出
invoke EndDialog,hWnd,NULL
.elseif eax==IDM_OPEN ;打开文件
.elseif eax==IDM_1
.elseif eax==IDM_2
.elseif eax==IDM_3
.endif
.else
mov eax,FALSE
ret
.endif
mov eax,TRUE
ret
_ProcDlgMain endp
start:
invoke LoadLibrary,offset szDllEdit
mov hRichEdit,eax
invoke GetModuleHandle,NULL
mov hInstance,eax
invoke DialogBoxParam,hInstance,\