WinAPI: GetClassName - 获取指定窗口的类名

WinAPI: GetClassName - 获取指定窗口的类名
//声明:
GetClassName(
  hWnd: HWND;         {指定窗口句柄}
  lpClassName: PChar; {缓冲区}
  nMaxCount: Integer  {缓冲区大小}
): Integer;           {返回类名大小; 失败返回 0}
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//测试1: 新建一个工程, 主窗口的类名默认是 TForm1, 用程序获取一下看看
var
  ps: array[0..254] of Char;
begin
  GetClassName(Handle, ps, 255);
  ShowMessage(ps); {TForm1}
end;
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//测试2: 看看 "计算器" 窗口的类名(先启动计算器)
var
  h: HWND;
  ps: array[0..254] of Char;
begin
  h := FindWindow(nil, ‘计算器‘); {这句是获取计算器窗口的句柄}
  GetClassName(h, ps, 255);
  ShowMessage(ps); {SciCalc}
end;
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//测试3: 看看记事本窗口的类名(先重新启动记事本):
var
  h: HWND;
  ps: array[0..254] of Char;
begin
  h := FindWindow(nil, ‘无标题 - 记事本‘); {这句是获取记事本窗口的句柄}
  GetClassName(h, ps, 255);
  ShowMessage(ps); {Notepad}
end;