dll.asm

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; Sample code for < Win32ASM Programming >
; by 罗云彬, http://asm.yeah.net
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; Dll.asm
; 用来被嵌入到其它进程执行的测试 dll
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; 使用 nmake 或下列命令进行编译和链接:
; ml /c /coff DLL.asm
; Link  /subsystem:windows /Dll DLL.obj
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		.386
		.model flat, stdcall
		option casemap :none
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; Include 文件定义
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include		windows.inc
include		user32.inc
includelib	user32.lib
include		kernel32.inc
includelib	kernel32.lib
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		.data?
hInstance	dd	?
hWinMain	dd	?

		.const
szClassName	db	'RemoteClass',0
szCaptionMain	db	'RemoteWindow',0
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		.code
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; 窗口过程
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_ProcWinMain	proc	uses ebx edi esi,hWnd,uMsg,wParam,lParam

		mov	eax,uMsg
		.if	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	uses ebx esi edi _lParam
		local	@stWndClass:WNDCLASSEX
		local	@stMsg:MSG

		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
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DllEntry	proc	_hInstance,_dwReason,_dwReserved
		local	@dwThreadID

		.if	_dwReason == DLL_PROCESS_ATTACH
			push	_hInstance
			pop	hInstance
			invoke	CreateThread,NULL,0,offset _WinMain,NULL,\
				NULL,addr @dwThreadID
			invoke	CloseHandle,eax
		.endif
		mov	eax,TRUE
		ret

DllEntry	Endp
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		End	DllEntry