參考網站:
http://winapi.freetechsecrets.com/win32/
http://masm32.com/board/index.php?topic=3584.0
https://www.plantation-productions.com/Webster/
https://www.plantation-productions.com/Webster/Win32Asm/win32API.html
線的起始點位置是位於(x=0, y=0),使用者可以呼叫MoveToEx()設定新的起始點,而使用LineTo()就可以畫出一條直線,新的起始點則是線的結束位置
main.hla
program main; #include("w.hhf") #include("args.hhf") #include("memory.hhf") #include("strings.hhf") static hWin: dword; hInstance: dword; CommandLine: string; defWndProc: dword; readonly szCaption: string:= "main"; procedure WndProc(hWnd:dword; uMsg:uns32; wParam:dword; lParam:dword); @stdcall; var hdc: dword; pen: dword[3]; ps: w.PAINTSTRUCT; begin WndProc; if (uMsg == w.WM_PAINT) then w.BeginPaint(hWnd, ps); mov(eax, hdc); w.CreatePen(w.PS_SOLID, 3, $ff); mov(eax, pen[0]); w.CreatePen(w.PS_SOLID, 3, $ff00); mov(eax, pen[4]); w.CreatePen(w.PS_SOLID, 3, $ff0000); mov(eax, pen[8]); w.SelectObject(hdc, pen[0]); w.MoveToEx(hdc, 10, 100, NULL); w.LineTo(hdc, 250, 100); w.SelectObject(hdc, pen[4]); w.MoveToEx(hdc, 10, 150, NULL); w.LineTo(hdc, 250, 150); w.SelectObject(hdc, pen[8]); w.MoveToEx(hdc, 10, 200, NULL); w.LineTo(hdc, 250, 200); w.EndPaint(hWnd, ps); w.DeleteObject(pen[0]); w.DeleteObject(pen[4]); w.DeleteObject(pen[8]); xor(eax, eax); elseif (uMsg == w.WM_CLOSE) then w.DestroyWindow(hWnd); xor(eax, eax); elseif (uMsg == w.WM_DESTROY) then w.PostQuitMessage(0); xor(eax, eax); else w.CallWindowProc(defWndProc, hWnd, uMsg, wParam, lParam); endif; end WndProc; procedure WinMain(hInst:dword; hPrevInst:dword; CmdLine:string; CmdShow:dword); var msg: w.MSG; begin WinMain; w.CreateWindowEx(w.WS_EX_LEFT, w.WC_DIALOG, szCaption, w.WS_OVERLAPPEDWINDOW | w.WS_VISIBLE, 0, 0, 300, 300, 0, 0, NULL, NULL); mov(eax, hWin); w.SetWindowLong(hWin, w.GWL_WNDPROC, &WndProc); mov(eax, defWndProc); forever w.GetMessage(msg, NULL, 0, 0); breakif(!eax); w.DispatchMessage(msg); endfor; mov(msg.wParam, eax); end WinMain; begin main; w.GetModuleHandle(NULL); mov(eax, hInstance); mov(arg.cmdLn(), CommandLine); WinMain(hInstance, NULL, CommandLine, w.SW_SHOWNORMAL); w.ExitProcess(eax); end main;
Line 28~45:產生三支Pen並且畫出三條直線,需要注意的是,同一時間只能選擇一支Pen
完成