代码如下：

program Project2;{
    $APPTYPE CONSOLE}{
    $R *.res}uses  System.SysUtils,  windows,  Winapi.Messages,  Vcl.Dialogs;var  swndClass: tagWNDCLASS;  message: MSG;  mHwnd: hwnd;  cxChar, cyChar: Integer;  cxClient, cyClient: Integer;function WindowProc(hwnd: hwnd; uMsg: UINT; wParam: wParam; lParam: lParam): LRESULT; stdcall;var  i:integer;  uHdc: HDC;  ps: tagPAINTSTRUCT;  tm: tagTEXTMETRIC;  str: string;begin  case uMsg of    WM_CREATE:      begin        {
    获取窗口尺寸}        cxclient := GetSystemMetrics(SM_CXSCREEN);        cyclient := GetSystemMetrics(SM_CYSCREEN);        {
    获取文本尺寸}        uHdc := GetDC(hwnd);        GetTextMetrics(uHdc, tm);        ReleaseDC(hwnd, uHdc);        cxChar := tm.tmAveCharWidth;        cyChar := tm.tmHeight + tm.tmExternalLeading;      end;    WM_PAINT:      begin        uHdc := BeginPaint(hwnd, ps);        for i := 0 to 100 do        begin          str:='Hello world num:' + i.ToString;          TextOut(uHdc,0,i*cychar,PWideChar(str),Length(str));        end;        EndPaint(hwnd, ps);      end;  end;  result := DefWindowProc(hwnd, uMsg, wParam, lParam);end;begin  swndClass.cbClsExtra := 0; //窗口类扩展，无  swndClass.cbWndExtra := 0; //窗口实例扩展  swndClass.hbrBackground := COLOR_BACKGROUND; //窗口背景颜色黑色  //LoadCursor()  swndClass.hCursor := LoadCursor(0, IDC_ARROW); //窗口采用箭头光标  swndClass.hIcon := LoadIcon(0, IDI_APPLICATION); //窗口最小化图标：采用缺省图标  swndClass.hInstance := hInstance; //窗口实例句柄  swndClass.lpfnWndProc := @WindowProc; //窗口处理函数  swndClass.lpszClassName := 'myWnd'; //窗口类名  swndClass.lpszMenuName := nil; //窗口菜单  swndClass.style := CS_DBLCLKS; //窗口样式  if RegisterClass(swndClass) = 0 then  begin    Writeln('windows class register error!');    Exit;  end;  mHwnd := CreateWindowEx(0, 'myWnd', 'Delphi Windows', WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 544, 375, HWND_DESKTOP, 0, hInstance, 0);  ShowWindow(mHwnd, SW_SHOW);  UpdateWindow(mHwnd);  while GetMessage(message, 0, 0, 0) do  begin    TranslateMessage(message);    DispatchMessage(message);  end;  Readln;end.