class with disk information, wchar_t use (C++ Builder)

CLASS:

#include <System.Classes.hpp>

#include <Vcl.Controls.hpp>

#include <Vcl.StdCtrls.hpp>

#include <Vcl.Forms.hpp>

#include <vcl.h>

#define length_bufor 255

class Disc

{

private:

DWORD sectors;

DWORD serial;

DWORD free_cl;

DWORD bytes_in_sector;

DWORD number_claster;

DWORD total_free_bytes;

wchar_t *changeDWORD(unsigned int value)

{

size_t i,j,width;

j=0;

wchar_t temp_buff1[50];

static wchar_t temp_buff2[75];

width=wcslen(temp_buff1);

swprintf(temp_buff1,sizeof(temp_buff1),L"%1u",value);

for(i=0;i<width;i++)

{

;

if(i&&((width-i)%3)==0)

{

;

temp_buff2[i+j]=' ';j++;

}

temp_buff2[i+j]=temp_buff1[i];

}

temp_buff2[i+j]=temp_buff1[i];

return temp_buff2;

}

wchar_t temp_Str[40];

UnicodeString Volumen;

UnicodeString BytSectors;

UnicodeString Serial;

UnicodeString temp_Path;

UnicodeString Sectors;

UnicodeString Claster;

UnicodeString FreeB;

public:

Disc(UnicodeString discPath)

{

UnicodeString vol;

vol.SetLength(length_bufor);

temp_Path=discPath;

if(GetVolumeInformation(temp_Path.w_str(),vol.w_str(),vol.Length(),&serial,

NULL,NULL,NULL,NULL))

{

_itow(serial,temp_Str,20);

Volumen=vol;

Serial=temp_Str;

GetDiskFreeSpace(temp_Path.w_str(),&sectors,&bytes_in_sector,&free_cl,&number_claster);

total_free_bytes=bytes_in_sector*sectors*number_claster;

Sectors=changeDWORD(sectors);

BytSectors=changeDWORD(bytes_in_sector);

Claster=changeDWORD(number_claster);

FreeB=changeDWORD(total_free_bytes);

}

else

{

ShowMessage("Disc is protected");

Application->Terminate();

}

}

UnicodeString give_Volumen()

{

return Volumen;

}

UnicodeString give_Serial()

{

return Serial;

}

UnicodeString give_Sectors()

{

return Sectors;

}

UnicodeString give_byte_in_Sector()

{

return BytSectors;

}

UnicodeString give_Claster()

{

return Claster;

}

UnicodeString give_free_Bytes()

{

return FreeB;

}

};

EXAMPLE:

void __fastcall TForm1::Button2Click(TObject *Sender)

{

  Disc my_D("C:\\");

  ListBox1->Items->Add(my_D.give_Volumen());

  ListBox1->Items->Add(my_D.give_Serial());

  ListBox1->Items->Add(my_D.give_Claster());

  ListBox1->Items->Add(my_D.give_Sectors());

  ListBox1->Items->Add(my_D.give_byte_in_Sector());

  ListBox1->Items->Add(my_D.give_free_Bytes());

}