程式語言 - MASM32 - Painting - Draw Polygon

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

Polygon()可以用來繪製多邊形，需要傳入的資訊是一個座標點陣列，用來描述有哪些點需要被連接

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\gdi32.inc
include c:\masm32\include\user32.inc
             
includelib c:\masm32\lib\msvcrt.lib
includelib c:\masm32\lib\gdi32.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
             
    .code
WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
    local hdc:dword
    local pen:dword
    local brush:dword
    local ps:PAINTSTRUCT
    local pt[3]:POINT
      
    .if uMsg == WM_PAINT
        invoke BeginPaint, hWnd, addr ps
        mov hdc, eax
      
        invoke CreatePen, PS_SOLID, 3, 0ffh
        mov pen, eax
        invoke CreateSolidBrush, 0ff00h
        mov brush, eax
   
        invoke SelectObject, hdc, pen
        invoke SelectObject, hdc, brush

        mov pt[sizeof POINT * 0].x, 150
        mov pt[sizeof POINT * 0].y, 10
        mov pt[sizeof POINT * 1].x, 50
        mov pt[sizeof POINT * 1].y, 200
        mov pt[sizeof POINT * 2].x, 250
        mov pt[sizeof POINT * 2].y ,200
        invoke Polygon, hdc, addr pt, 3
     
        invoke EndPaint, hWnd, addr ps
        invoke DeleteObject, pen
        invoke DeleteObject, brush
        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 43~49：使用三個座標點畫出一個三角形

完成