win32实现秒表汇编语言代码

以下是一个基于 Win32 API 实现的秒表汇编语言代码示例：

.586
.model flat, stdcall
option casemap:none

include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc

includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

.DATA
ClassName db "StopwatchClass",0
AppName db "Stopwatch",0
TimerID dd ?
StartTime dd ?
EndTime dd ?
ElapsedTime dd ?
Paused dd ?
PausedTime dd ?
hWin dd ?

.DATA?
hInstance HINSTANCE ?

.CODE

WinMain PROC hInst:HINSTANCE, hPrevInst:HINSTANCE, lpCmdLine:LPSTR, nShowCmd:DWORD
    LOCAL wc:WNDCLASS
    LOCAL msg:MSG

    mov hInstance, hInst
    
    ; Register the window class
    mov wc.style, CS_HREDRAW or CS_VREDRAW
    mov wc.lpfnWndProc, OFFSET WndProc
    mov wc.cbClsExtra, 0
    mov wc.cbWndExtra, 0
    push hInstance
    pop wc.hInstance
    mov wc.hbrBackground, COLOR_BTNFACE + 1
    mov wc.lpszMenuName, NULL
    mov wc.lpszClassName, OFFSET ClassName
    invoke RegisterClass, ADDR wc
    
    ; Create the window
    invoke CreateWindowEx, WS_EX_CLIENTEDGE, ADDR ClassName, ADDR AppName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 200, 100, NULL, NULL, hInstance, NULL
    mov hWin, eax
    invoke ShowWindow, hWin, nShowCmd
    invoke UpdateWindow, hWin
    
    ; Message loop
    .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 rect:RECT
    LOCAL szText:BYTE 20 DUP(?)
    LOCAL dwStyle:DWORD
    
    .IF uMsg == WM_CREATE
        ; Set the timer
        invoke SetTimer, hWnd, 1, 10, NULL
        mov TimerID, eax
        ; Set the start time
        invoke GetTickCount
        mov StartTime, eax
        ; Set the paused flag
        mov Paused, 0
        mov PausedTime, 0
    .ELSEIF uMsg == WM_DESTROY
        ; Kill the timer
        invoke KillTimer, hWnd, TimerID
        ; Quit the application
        invoke PostQuitMessage, NULL
    .ELSEIF uMsg == WM_PAINT
        ; Get the device context
        invoke BeginPaint, hWnd, ADDR ps
        mov hdc, eax
        ; Get the client area
        invoke GetClientRect, hWnd, ADDR rect
        ; Set the text color
        invoke SetTextColor, hdc, RGB(0, 0, 255)
        ; Set the text background color
        invoke SetBkColor, hdc, RGB(255, 255, 255)
        ; Set the font
        invoke SetBkMode, hdc, OPAQUE
        invoke CreateFont, 20, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH or FF_DONTCARE, ADDR szText
        invoke SelectObject, hdc, eax
        ; Calculate the elapsed time
        .IF Paused == 0
            invoke GetTickCount
            sub eax, StartTime
            add eax, PausedTime
            mov ElapsedTime, eax
        .ELSE
            mov eax, PausedTime
            mov ElapsedTime, eax
        .ENDIF
        ; Format the time as a string
        mov eax, ElapsedTime
        mov ebx, 1000
        div ebx
        mov ecx, eax
        mov eax, ElapsedTime
        mov edx, 1000
        div edx
        mov edx, eax
        mov eax, ecx
        invoke wsprintf, ADDR szText, ADDR FORMAT, eax, edx
        ; Draw the text
        invoke DrawText, hdc, ADDR szText, -1, ADDR rect, DT_CENTER or DT_VCENTER or DT_SINGLELINE
        ; Clean up
        invoke DeleteObject, eax
        invoke EndPaint, hWnd, ADDR ps
    .ELSEIF uMsg == WM_TIMER
        ; Redraw the window
        invoke InvalidateRect, hWnd, NULL, TRUE
    .ELSEIF uMsg == WM_LBUTTONDOWN
        ; Pause or unpause the stopwatch
        .IF Paused == 0
            invoke GetTickCount
            sub eax, StartTime
            mov PausedTime, eax
            mov Paused, 1
        .ELSE
            invoke GetTickCount
            mov StartTime, eax
            mov Paused, 0
        .ENDIF
    .ELSE
        ; Call the default window procedure for other messages
        invoke DefWindowProc, hWnd, uMsg, wParam, lParam
        ret
    .ENDIF
    
    xor eax, eax
    ret
WndProc ENDP

END WinMain

这个示例程序使用 Win32 API 来创建一个窗口，并在窗口中实现一个秒表。在窗口创建时，程序会设置一个定时器，每 10 毫秒触发一次。在每次定时器触发时，程序会重新绘制窗口，显示经过的时间。当用户点击窗口时，程序会暂停或恢复秒表的计时。程序使用 GetTickCount 函数来获取当前时间，以计算经过的时间。在窗口绘制时，程序使用 wsprintf 函数格式化时间为字符串，并使用 DrawText 函数在窗口中绘制时间文本。