win32位汇编程序出错，望调试
程序代码： .386
.model flat,stdcall
option casemap:none
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; Include 文件定义
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include windows.inc
include gdi32.inc
includelib gdi32.lib
include user32.inc
includelib user32.lib
include kernel32.inc
includelib kernel32.lib
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; 数据段
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.data?
hInstance dd ?
hWinMain dd ?
.const
szClassName db "MyClass",0
szCaption db "My first Window !",0
szText db "Win32 Assembly, Simpel and powerful !",0
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; 代码段
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.code
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; 窗口过程
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_ProcWinMain proc hWnd,uMsg,wParam,lParam
local @stPs:PAINTSTRUCT
local @stRect:RECT
local @hDc
mov eax,uMsg
;***********************************************************************************************
.if eax == WM_PAINT
invoke BeginPaint,hWnd,addr @stPs
mov @hDc,eax
invoke GetClientRect,@hDc,addr @stRect
invoke DrawText,@hDc,offset szText,-1,addr @stRect,\
DT_SINGLELINE or DT_CENTER or DT_VCENTER
invoke EndPaint,hWnd,addr @stPs
;***********************************************************************************************
.elseif eax == WM_CLOSE
invoke DestroyWindow,hWnd
invoke PostQuitMessage,NULL
;************************************************************************************************
.else
invoke DefWindowProc,hWnd,uMsg,wParam,lParam
ret
.endif
;*************************************************************************************************
xor eax,eax
ret
_ProcWinMain endp
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_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 szCaption,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
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start:
call _WinMain
invoke ExitProcess,NULL
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end start运行后窗口过程中的WM_PAINT没有得到输出，求调试，此贴绝非水贴，除去打酱油的十到二十分外其余分一律给解题人(话说偶真的熬不住了，还要生地会考压力大，这种错误可能查找的时间不多，所以SOS啊...)
