[시스템] 윈도우즈 전체의 마우스/키보드 입력 금지

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
  function FuncAvail(_dllname, _funcname: string; var _p: pointer): boolean;
  var _lib: tHandle;
  begin
    Result := false;
    _p := NIL;
    if LoadLibrary(PChar(_dllname)) = 0 then exit;
    _lib := GetModuleHandle(PChar(_dllname));
    if _lib <> 0 then
    begin
      _p := GetProcAddress(_lib, PChar(_funcname));
      if _p <> NIL then
        Result := true;
    end;
  end;
var
  xBlockInput: function(Block: BOOL): BOOL; stdcall;
begin
  if FuncAvail('USER32.DLL', 'BlockInput', @xBlockInput) then
  begin
    xBlockInput(true);
    Sleep(5000); // 시간
    xBlockInput(false);
  end;
end;

end.