谁能帮我解决这个win32程序的链接错误
下面的程序本是书上的原程序，我只是把它的结构改了一下，原程序是把_WinMain和_ProcWinMain这两个过程的定义放在前面，而我就把它们的定义放在后面了，然后就在数据段前面加了下面两条语句：
_WinMain proto
_ProcWinMain proto hWnd:DWORD ,uMsg:DWORD ,wParam:DWORD ,lParam:DWORD
可链接时就出错了，我实在不知问题出在哪了，哪位高手帮我指正一下
程序代码：.386
.model flat,stdcall
option casemap:none
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
;Include 文件定义
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Include windows.inc
Include gdi32.inc
Includelib gdi32.lib
Include user32.inc
Includelib user32.lib
Include kernel32.inc
Includelib kernel32.lib
_WinMain proto
_ProcWinMain proto hWnd:DWORD ,uMsg:DWORD ,wParam:DWORD ,lParam:DWORD
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
;数据段
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
.data?
hInstance DWORD ?
hWinMain DWORD ?
.const
szClassName BYTE 'MyClass',0
szCaptionMain BYTE 'My first Window!',0
szText BYTE 'I am coming! Win32!',0
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
;代码段
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
.code
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
start:
invoke _WinMain
invoke ExitProcess,NULL
end start
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
_WinMain proc
local @stWndClass:WNDCLASSEX
local @stMsg:MSG
invoke GetModuleHandle,NULL
mov hInstance,eax
invoke RtlZeroMemory,addr @stWndClass,sizeof @stWndClass
;**************************************************************
;注册窗口类
;**************************************************************
invoke LoadCursor,0,IDC_ARROW
mov @stWndClass.hCursor,eax
push hInstance
pop @stWndClass.hInstance
mov @stWndClass.cbSize,sizeof WNDCLASSEX
mov @stWndClass.style,CS_HREDRAW or CS_VREDRAW
mov @stWndClass.lpfnWndProc,offset _ProcWinMain
mov @stWndClass.hbrBackground,COLOR_WINDOW+1
mov @stWndClass.lpszClassName,offset szClassName
invoke RegisterClassEx,addr @stWndClass
;**************************************************************
;建立并显示窗口
;**************************************************************
invoke CreateWindowEx,WS_EX_CLIENTEDGE,offset szClassName,offset szCaptionMain,WS_OVERLAPPEDWINDOW,100,100,600,400,NULL,NULL,hInstance,NULL
mov hWinMain,eax
invoke ShowWindow,hWinMain,SW_SHOWNORMAL
invoke UpdateWindow,hWinMain
;**************************************************************
;消息循环
;**************************************************************
.while TRUE
invoke GetMessage,addr @stMsg,NULL,0,0
.break .if eax==0
invoke TranslateMessage,addr @stMsg
invoke DispatchMessage,addr @stMsg
.endw
ret
_WinMain endp
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
;窗口过程
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
_ProcWinMain proc uses ebx edi esi,hWnd,uMsg,wParam,lParam
local @stPs:PAINTSTRUCT
local @stRect:RECT
local @hDc:DWORD
mov eax,uMsg
.if eax==WM_PAINT
invoke BeginPaint,hWnd,addr @stPs
mov @hDc,eax
invoke GetClientRect,hWnd,addr @stRect
invoke DrawText,@hDc,addr szText,-1,addr @stRect,DT_SINGLELINE or DT_CENTER or DT_VCENTER
invoke EndPaint,hWnd,addr @stPs
.elseif eax==WM_CLOSE
invoke DestroyWindow,hWinMain
invoke PostQuitMessage,NULL
.else
invoke DefWindowProc,hWnd,uMsg,wParam,lParam
ret
.endif
xor eax,eax
ret
_ProcWinMain endp
;>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
