1   
2    //---------------------------------------------------------------------------
3   
4   #include <vcl.h>
5   #pragma hdrstop
6   
7   #include "Unit1.h"
8   //---------------------------------------------------------------------------
9   #pragma package(smart_init)
10  #pragma resource "*.dfm"
11  TForm1 *Form1;
12  //---------------------------------------------------------------------------
13  __fastcall TForm1::TForm1(TComponent* Owner)
14          : TForm(Owner)
15  {
16  }
17  bool AppFrozen(HWND H){
18  unsigned long dwResult;
19  unsigned int timeout = 3000; // ms
20  
21  return SendMessageTimeout(H, WM_NULL, 0, 0,
22                                    SMTO_ABORTIFHUNG || SMTO_BLOCK,
23                                    timeout,
24                                     &dwResult) != 0;
25  }
26  //---------------------------------------------------------------------------
27  
28  void __fastcall TForm1::Button1Click(TObject *Sender)
29  {
30  
31  HWND  H;
32  
33     H = FindWindow(NULL, "Name of Application");
34    if (H != 0){
35      if (AppFrozen(H)) {
36        ShowMessage("This Application is Frozen!");
37  
38    }
39    }
40  
41  
42  }
43  //---------------------------------------------------------------------------