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 IsFileInUse(AnsiString Name){
18  HANDLE HFileRes;
19  bool bUse;
20  
21        HFileRes = CreateFile(Name.c_str(),
22                           GENERIC_READ || GENERIC_WRITE,
23                           0,
24                           NULL,
25                           OPEN_EXISTING,
26                           FILE_ATTRIBUTE_NORMAL,
27                           0);
28  
29    return  (HFileRes == INVALID_HANDLE_VALUE);
30  
31  }
32  
33  //---------------------------------------------------------------------------
34  
35  void __fastcall TForm1::Button1Click(TObject *Sender)
36  {
37    if (OpenDialog1->Execute()) {
38      if (IsFileInUse(OpenDialog1->FileName)) {
39                ShowMessage("File is in use!");
40                }
41     else
42       {
43       ShowMessage("File NOT in use!");
44       }
45  
46  }
47  
48  }
49  //---------------------------------------------------------------------------
50