1   
2   //This code works with windows 95/98 and possibly windows XP Home but it
3   //dose not work with NT/2000/XP Pro.
4   //---------------------------------------------------------------------------
5   
6   #include <vcl.h>
7   #pragma hdrstop
8   
9   #include "Unit1.h"
10  //---------------------------------------------------------------------------
11  #pragma package(smart_init)
12  #pragma resource "*.dfm"
13  TForm1 *Form1;
14  //---------------------------------------------------------------------------
15  __fastcall TForm1::TForm1(TComponent* Owner)
16          : TForm(Owner)
17  {
18  }
19  //---------------------------------------------------------------------------
20  
21  
22  
23  void __fastcall TForm1::Button2Click(TObject *Sender)
24  {
25  
26  // disable task switching
27    SystemParametersInfo(97, true, NULL, NULL);
28  
29  }
30  //---------------------------------------------------------------------------
31  
32  void __fastcall TForm1::Button1Click(TObject *Sender)
33  {
34  // enable task switching
35     SystemParametersInfo(97, false, NULL, NULL);
36  }
37  //---------------------------------------------------------------------------