程式語言 - Netwide Assembler (NASM) - Win32 API (NASMX) - Painting - Create Font

參考資訊：
https://masm32.com/board/index.php
https://www.nasm.us/xdoc/2.13rc9/html/nasmdoc0.html

在Windows視窗程式設計中，當需要文字輸出顯示在視窗上時，一般都會使用自定義的字型，因為系統預設的字型太小，而自定義的字型，除了可以是粗體或者斜體，還可以設定自定義的長寬尺寸，司徒使用一個簡單例子來說明如何建立自定義的字型

main.asm

    %include "c:\\nasmx\\inc\\nasmx.inc"
    %include "c:\\nasmx\\inc\\win32\\msvcrt.inc"
    %include "c:\\nasmx\\inc\\win32\\windows.inc"
    %include "c:\\nasmx\\inc\\win32\\gdi32.inc"
    %include "c:\\nasmx\\inc\\win32\\user32.inc"
    %include "c:\\nasmx\\inc\\win32\\kernel32.inc"
            
    entry start

    false             equ 0
    CLEARTYPE_QUALITY equ 5
            
    section .data
szCaption    declare(NASMX_TCHAR) NASMX_TEXT("main"),0
szFont       declare(NASMX_TCHAR) NASMX_TEXT("Arial"),0
szMsg        declare(NASMX_TCHAR) NASMX_TEXT("Test"),0
dwMsg        equ ($ - szMsg) - 1
hWin         dd 0
hInstance    dd 0
defWndProc   dd 0
CommandLine  dd 0
  
NASMX_ISTRUC msg, MSG
NASMX_IENDSTRUC
        
NASMX_ISTRUC ps, PAINTSTRUCT
NASMX_IENDSTRUC
             
    section .text
proc WndProc, dword hWnd, uint_t uMsg, dword wParam, dword lParam
    locals
        local hdc, DWORD
        local font, DWORD
    endlocals
          
    switch dword [argv(.uMsg)]
    case dword WM_PAINT
        invoke BeginPaint, [argv(.hWnd)], ps
        mov [var(.hdc)], eax
        
        invoke CreateFont, 48, 0, 0, 0, FW_BOLD, false, false, false, 0, \
            OUT_OUTLINE_PRECIS, CLIP_DEFAULT_PRECIS, \
            CLEARTYPE_QUALITY, DEFAULT_PITCH | FF_DONTCARE, szFont
        mov [var(.font)], eax

        invoke SetTextColor, [var(.hdc)], 0xff
        invoke SetBkMode, [var(.hdc)], TRANSPARENT
        invoke SelectObject, [var(.hdc)], [var(.font)]
        invoke TextOut, [var(.hdc)], 100, 100, szMsg, dwMsg
       
        invoke EndPaint, [argv(.hWnd)], ps
        invoke DeleteObject, [var(.font)]
        break
    case dword WM_CLOSE
        invoke DestroyWindow, [argv(.hWnd)]
        break
    case dword WM_DESTROY
        invoke PostQuitMessage, 0
        break
    default
        invoke CallWindowProc, [defWndProc], [argv(.hWnd)], [argv(.uMsg)], [argv(.wParam)], [argv(.lParam)]
    endswitch
endproc
             
proc WinMain, dword hInst, dword hPrevInst, dword CmdLine, dword CmdShow
    locals none
              
    invoke CreateWindowEx, WS_EX_LEFT, WC_DIALOG, szCaption, \
        WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL
    mov [hWin], eax
             
    invoke SetWindowLong, [hWin], GWL_WNDPROC, WndProc
    mov [defWndProc], eax
         
    do
        invoke DispatchMessage, msg
        invoke GetMessage, msg, NULL, NULL, NULL
    while eax, !=, 0
              
    mov eax, dword [msg + MSG.wParam]
endproc
              
proc start, dword argc, dword argv
    locals none
              
    invoke GetModuleHandle, NULL
    mov [hInstance], eax
              
    invoke GetCommandLine, NULL
    mov [CommandLine], eax
              
    invoke WinMain, [hInstance], NULL, [CommandLine], SW_SHOWNORMAL
    invoke ExitProcess, NULL
endproc

Line 41~44：創造一個大小48、粗體的Arial字型

完成