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  void RemoveCDXByte( String dbFile ){
18  const Value = 0;
19  const CDXoffSet = 28;
20  int handle;
21  char buffer;
22   handle = FileOpen( dbFile,fmOpenReadWrite+fmShareExclusive );
23    if( handle > 0 ){
24     try{
25          FileSeek( handle,CDXoffSet,0 );
26          FileRead( handle,&buffer,1);
27          if ( buffer == '\x01' ) {  //checks if index marker exists
28             FileSeek( handle,CDXoffSet,0);
29             buffer = '\x00' ;     //sets detach marker file
30             FileWrite( handle,&buffer,1 );//writes detach marker in table file
31          }
32        }
33          catch (Exception &exception)
34          {
35  
36          }
37         FileClose(handle);
38    }
39  }
40  //---------------------------------------------------------------------------
41  
42  void __fastcall TForm1::Button1Click(TObject *Sender)
43  {
44    if(OpenDialog1->Execute()){
45     RemoveCDXByte(OpenDialog1->FileName);
46    }
47  }
48  //---------------------------------------------------------------------------