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//   Delphi 下调用Windows API 创建窗体.       //
 //  模板-------BY Hottey 2004-4-13-0:18       //
 //  作者网站:http://asp.itdrp.com/hottey      //
 program delphi;
 
 uses
 windows,
 messages;
 
 const
 hellostr='Hello World!';
 
 {$R delphi.res}
 
 
 //窗口消息处理函数.
 function MyWinProc(hWnd:THandle;uMsg:UINT;wParam,lParam:Cardinal):Cardinal;exp
 ort;stdcall;
 
 var
 hdca,hdcb:THandle;         //设备描述表句柄.
 rect:TRect;                //矩形结构.
 font:HFont;
 ps:TPaintStruct;           //绘图结构.
 begin
 result:=0;
 case uMsg of
 WM_PAINT:
 begin
 hdca:=BeginPaint(hWnd,ps);
 SetBkMode(hdca, Transparent);
 SetBkColor(hdca,GetBkColor(hdca));
 GetClientRect(hWnd,rect);      //获取窗口客户区的尺寸.
 DrawText(hdca,Pchar(hellostr),-1,rect,DT_SINGLELINE or DT_CENTER or DT
 _VCENTER);
 //      TextOut(hdc,100,40,hellostr,Length(hellostr));
 EndPaint(hWnd,ps);
 end;
 WM_CREATE:
 begin
 hdcb  := GetDC(hWnd);
 font  := CreateFont(45, 0, 0, 0, FW_normal, 0, 0, 0, ansi_charset, out
 _default_precis, clip_default_precis,
 default_quality, 34, PChar('Arial'));
 SelectObject(hdcb, font);
 ReleaseDC(hWnd, hdcb);
 end;
 WM_DESTROY:
 PostQuitMessage(0)
 else
 //使用缺省的窗口消息处理函数.
 result:=DefWindowProc(hWnd,uMsg,wParam,lParam);
 end;
 end;
 
 //主程序开始.
 
 var
 Msg        :TMsg;          //消息结构.
 hWnd,hInst :THandle;       //Windows 窗口句柄.
 WinClass   :TWndClassEx;   //Windows 窗口类结构.
 begin
 hInst:=GetModuleHandle(nil); // get the application instance
 WinClass.cbSize:=SizeOf(TWndClassEx);
 WinClass.lpszClassName:='MyWindow';         //类名.
 WinClass.style:=CS_HREDRAW or CS_VREDRAW or CS_OWNDC;
 WinClass.hInstance:=hInst;              //程序的实例句柄.
 //设置窗口消息处理函数.
 WinClass.lpfnWndProc:=@MyWinProc;           //窗口过程.
 WinClass.cbClsExtra:=0;                     //以下两个域用于在类结构和Window
 s内部保存的窗口结构
 WinClass.cbWndExtra:=0;                     //中预留一些额外空间.
 WinClass.hIcon:=LoadIcon(hInstance,MakeIntResource('MAINICON'));
 WinClass.hIconsm:=LoadIcon(hInstance,MakeIntResource('MAINICON'));
 WinClass.hCursor:=LoadCursor(0,IDC_Arrow);
 //GetStockObject 获取一个图形对象,在这里是获取绘制窗口背景的刷子,返回一个白色刷
 子的句柄.
 WinClass.hbrBackground:=HBRUSH(GetStockObject(white_Brush));
 WinClass.lpszMenuName:=nil;                 //指定窗口类菜单.
 
 //向Windows 注册窗口类.
 if RegisterClassEx(WinClass)=0 then
 begin
 MessageBox(0,'Registeration Error!','SDK/API',MB_OK);
 Exit;
 end;
 
 //建立窗口对象.
 hWnd:=CreateWindowEx(
 WS_EX_OVERLAPPEDWINDOW,                 //扩展的窗口风格.
 WinClass.lpszClassName,                 //类名.
 'Hello Window',                         //窗口标题.
 WS_OVERLAPPEDWINDOW,                    //窗口风格.
 CW_USEDEFAULT,                          //窗口左上角相对于屏幕
 左上角的初始位置x.
 0,                                      //....右y.
 CW_USEDEFAULT,                          //窗口宽度x.
 0,                                      //窗口高度y.
 0,                                      //父窗口句柄.
 0,                                      //窗口菜单句柄.
 hInst,                                  //程序实例句柄.
 nil);                                   //创建参数指针.
 if hWnd<>0 then
 begin
 ShowWindow(hWnd,SW_SHOWNORMAL);        //显示窗口.
 UpdateWindow(hWnd);                    //指示窗口刷新自己.
 SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE + SWP_NOSIZE);
 
 end
 else
 MessageBox(0,'Window not Created!','SDK/API',MB_OK);
 
 //主消息循环程序.
 while GetMessage(Msg,0,0,0) do
 begin
 TranslateMessage(Msg);                   //转换某些键盘消息.
 DispatchMessage(Msg);                    //将消息发送给窗口过程.
 end;
 end.
 
 >其实Windows 编程是每个学写程序的人都要掌握的,学Delphi时也最好能先学习Windos编
 程(最少要知道).以上代码虽说不如在Delphi中直接来个New->Form来的快,但它能告诉你本
 质的东西.能让你更好的了解消息循环以及其他.而这些正是让New出来的窗体给掩盖的部分
 .
 >注:以上代码是我从Windows 程序设计上通过C++语法直译过来的(),测试后没有问题.若我
 的注解有什么错误的地方,请各位指正!^_^
 
 hottey 于2004-5-19
 作者网站:http://asp.itdrp.com/hottey  (附例程)
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