程式語言 - ObjAsm - Keyboard Event

參考資訊：
https://github.com/ObjAsm
https://objasm.x10host.com/index.htm

main.asm

%include @Environ(OBJASM_PATH)\Code\Macros\Model.inc
SysSetup OOP, WIN32, ANSI_STRING

MakeObjects Primer, Stream, WinPrimer, Window, WinApp, SdiApp

    .const
CStr szName, "main"

Object MyApp, , SdiApp
    RedefineMethod Init
    VirtualEvent OnKeyDown, WM_KEYDOWN
    VirtualEvent OnPaint, WM_PAINT

    DefineVariable wndClass, WNDCLASS, {0}
ObjectEnd

    .code    
Method MyApp.Init, uses esi
    SetObject esi
    ACall esi.Init

    m2m [esi].wndClass.hbrBackground, COLOR_WINDOW
    m2m [esi].wndClass.lpfnWndProc, $MethodAddr(MyApp.WndProc)
    m2m [esi].wndClass.lpszClassName, offset szName
    invoke RegisterClass, addr [esi].wndClass

    invoke CreateWindowEx, WS_EX_LEFT, offset szName, offset szName,
        WS_OVERLAPPEDWINDOW or WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, pSelf
    m2m [esi].hWnd, eax
MethodEnd

Method MyApp.OnPaint, uses esi, wParam:WPARAM, lParam:LPARAM
    local hDC:HDC
    local PS:PAINTSTRUCT

    SetObject esi
    mov hDC, $invoke(BeginPaint, [esi].hWnd, addr PS) 
    invoke EndPaint, [esi].hWnd, addr PS
MethodEnd

Method MyApp.OnKeyDown, uses esi, wParam:WPARAM, lParam:LPARAM
    local buf[255]:byte

    SetObject esi
    invoke wsprintf, addr buf, $OfsCStr("Key: %d"), wParam
    invoke SetWindowText, [esi].hWnd, addr buf
    invoke DefWindowProc, [esi].hWnd, WM_KEYDOWN, wParam, lParam
MethodEnd

start proc
    SysInit

    OCall $ObjTmpl(MyApp)::MyApp.Init
    OCall $ObjTmpl(MyApp)::MyApp.Run
    OCall $ObjTmpl(MyApp)::MyApp.Done

    SysDone
    invoke ExitProcess, 0
start endp

end

完成