程式語言 - MASM32 - Keyboard Event

參考資訊：
http://www.winprog.org/tutorial/
http://winapi.freetechsecrets.com/win32/
https://github.com/gammasoft71/Examples_Win32

WM_KEYDOWN、WM_KEYUP是一般鍵盤按鍵事件，而WM_SYSKEYDOWN、WM_SYSKEYUP則是屬於系統按鍵的事件，系統按鍵就是左上角小視窗圖案的那些按鍵命令

WM_KEYDOWN、WM_KEYUP

nVirtKey = (int) wParam; // virtual-key code
lKeyData = lParam;       // key data

WM_SYSKEYDOWN、WM_SYSKEYUP

nVirtKey = (int) wParam; // virtual-key code
lKeyData = lParam;       // key data

main.asm

    .386
    .model flat,stdcall
    option casemap:none
   
include c:\masm32\include\msvcrt.inc
include c:\masm32\include\windows.inc
include c:\masm32\include\kernel32.inc
include c:\masm32\include\user32.inc
   
includelib c:\masm32\lib\msvcrt.lib
includelib c:\masm32\lib\user32.lib
includelib c:\masm32\lib\kernel32.lib
   
    .data
szCaption   db "main",0
hWin        dd 0
hInstance   dd 0
CommandLine dd 0
defWndProc  dd 0
buf         db 255 dup(0)
fmt         db "Key: %d",0
   
    .code
WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
    .if uMsg == WM_KEYDOWN || uMsg == WM_SYSKEYDOWN
        invoke crt_sprintf, offset buf, offset fmt, wParam
        invoke SetWindowText, hWnd, offset buf
        xor eax, eax
        ret
    .elseif uMsg == WM_CLOSE
        invoke DestroyWindow, hWnd
        xor eax, eax
        ret
    .elseif uMsg == WM_DESTROY
        invoke PostQuitMessage, 0
        xor eax, eax
        ret
    .endif
 
    invoke CallWindowProc, defWndProc, hWnd, uMsg, wParam, lParam
    ret
WndProc endp
  
WinMain proc hInst:DWORD, hPrevInst:DWORD, CmdLine:DWORD, CmdShow:DWORD
    local msg:MSG
   
    invoke CreateWindowEx, WS_EX_LEFT, WC_DIALOG, offset szCaption, 
        WS_OVERLAPPEDWINDOW or WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL
    mov hWin, eax
  
    invoke SetWindowLong, hWin, GWL_WNDPROC, WndProc
    mov defWndProc, eax
  
@@:
    invoke GetMessage, addr msg, NULL, 0, 0
    cmp eax, 0
    je @f
    invoke DispatchMessage, addr msg
    jmp @b
@@:
    mov eax, msg.wParam
    ret
WinMain endp
 
start:
    invoke GetModuleHandle, NULL
    mov hInstance, eax
   
    invoke GetCommandLine
    mov CommandLine, eax
   
    invoke WinMain, hInstance, NULL, CommandLine, SW_SHOWDEFAULT
    invoke ExitProcess, eax
end start

Line 25~29：將按鍵數值顯示在視窗標題

完成