例子：

.386
.model flat,stdcall
option casemap:none

WinMain proto :DWORD,:DWORD,:DWORD,:DWORD

include /masm32/include/windows.inc
include /masm32/include/user32.inc
include /masm32/include/kernel32.inc
include /masm32/include/gdi32.inc
includelib /masm32/lib/user32.lib
includelib /masm32/lib/kernel32.lib
includelib /masm32/lib/gdi32.lib

RGB macro red,green,blue
xor eax,eax
mov ah,blue
shl eax,8
mov ah,green
mov al,red
endm

.data
ClassName db "SimpleWinClass",0
AppName db "Our First Window",0
TestString db "Win32 assembly is great and easy!",0
FontName db "script",0

.data?
hInstance HINSTANCE ?
CommandLine LPSTR ?

.code
start:
invoke GetModuleHandle, NULL
mov hInstance,eax
invoke GetCommandLine
mov CommandLine,eax
invoke WinMain, hInstance,NULL,CommandLine, SW_SHOWDEFAULT
invoke ExitProcess,eax

WinMain proc hInst:HINSTANCE,hPrevInst:HINSTANCE,CmdLine:LPSTR,CmdShow:DWORD
LOCAL wc:WNDCLASSEX
LOCAL msg:MSG
LOCAL hwnd:HWND
mov wc.cbSize,SIZEOF WNDCLASSEX
mov wc.style, CS_HREDRAW or CS_VREDRAW
mov wc.lpfnWndProc, OFFSET WndProc
mov wc.cbClsExtra,NULL
mov wc.cbWndExtra,NULL
push hInst
pop wc.hInstance
mov wc.hbrBackground,COLOR_WINDOW+1
mov wc.lpszMenuName,NULL
mov wc.lpszClassName,OFFSET ClassName
invoke LoadIcon,NULL,IDI_APPLICATION
mov wc.hIcon,eax
mov wc.hIconSm,eax
invoke LoadCursor,NULL,IDC_ARROW
mov wc.hCursor,eax
invoke RegisterClassEx, addr wc
invoke CreateWindowEx,NULL,ADDR ClassName,ADDR AppName,/
WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,/
CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,/
hInst,NULL
mov hwnd,eax
invoke ShowWindow, hwnd,SW_SHOWNORMAL
invoke UpdateWindow, hwnd
.WHILE TRUE
invoke GetMessage, ADDR msg,NULL,0,0
.BREAK .IF (!eax)
invoke TranslateMessage, ADDR msg
invoke DispatchMessage, ADDR msg
.ENDW
mov eax,msg.wParam
ret
WinMain endp

WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
LOCAL hdc:HDC
LOCAL ps:PAINTSTRUCT
LOCAL hfont:HFONT

.IF uMsg==WM_DESTROY
invoke PostQuitMessage,NULL
.ELSEIF uMsg==WM_PAINT
invoke BeginPaint,hWnd, ADDR ps
mov hdc,eax
invoke CreateFont,24,16,0,0,400,0,0,0,OEM_CHARSET,/
OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS,/
DEFAULT_QUALITY,DEFAULT_PITCH or FF_SCRIPT,/
ADDR FontName
invoke SelectObject, hdc, eax
mov hfont,eax
RGB 200,200,50
invoke SetTextColor,hdc,eax
RGB 0,0,255
invoke SetBkColor,hdc,eax
invoke TextOut,hdc,0,0,ADDR TestString,SIZEOF TestString
invoke SelectObject,hdc, hfont
invoke EndPaint,hWnd, ADDR ps
.ELSE
invoke DefWindowProc,hWnd,uMsg,wParam,lParam
ret
.ENDIF
xor eax,eax
ret
WndProc endp

end start

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