Get the disk drive letter getlogicaldrivestrings, heapalloc

: Findalldrivers ()
{
Ccombobox * driver = (ccombobox *) getdlgitem (idc_driver );
DWORD dwnumbytesfordrivestrings; // String Length of the actual storage drive letter
Handle hheap;
Lpstr LP;
Cstring strlogdrive;

// Obtain the string length of the actual storage drive letter
Dwnumbytesfordrivestrings = getlogicaldrivestrings (0, null) * sizeof (tchar );

// If the string is not empty, a normal drive exists.
If (dwnumbytesfordrivestrings! = 0 ){
// Allocate string Space
Hheap = getprocessheap ();
Lp = (lpstr) heapalloc (hheap, heap_zero_memory,
Dwnumbytesfordrivestrings );

// Obtain the string indicating all drives
Getlogicaldrivestrings (heapsize (hheap, 0, LP), LP );

// Place the drives one by one in the drop-down box
While (* lp! = 0 ){
Driver-> addstring (LP );
Lp = _ tcschr (LP, 0) + 1;
}
}
Else
Afxmessagebox ("can't use the function getlogicaldrivestrings! ");
}

 

Clistctrl * plist = (clistctrl *) getdlgitem (idc_list );
Plist-> modifystyle (lvs_icon | lvs_smallicon | lvs_list, lvs_report );
Plist-> setextendedstyle (lvs_ex_gridlines | lvs_ex_fullrowselect );
Plist-> insertcolumn (0, _ T ("drive name"), lvcfmt_left, 100 );
Plist-> insertcolumn (1, _ T ("drive type"), lvcfmt_left, 100 );
Plist-> insertcolumn (2, _ T ("drive volume label"), lvcfmt_left, 100 );
Plist-> insertcolumn (3, _ T ("drive serial number"), lvcfmt_left, 100 );
Plist-> insertcolumn (4, _ T ("drive file system"), lvcfmt_left, 100 );
Plist-> insertcolumn (5, _ T ("available space"), lvcfmt_left, 100 );
Plist-> insertcolumn (6, _ T ("total space"), LV cfmt_left, 100 );

Clistctrl * plist = (clistctrl *) getdlgitem (idc_list );
Plist-> deleteallitems ();

// Obtain the drive bit mask
DWORD dwbitmask =: getlogicaldrives ();
If (dwbitmask! = 0)
{
Int n = 0;

Tchar CH = 'a ';

While (dwbitmask> 0)
{
If (dwbitmask % 2 = 1)
{
// Drive name
Cstring strdirivename = _ T ("");
Strdirivename. Format (_ T ("% C: \"), ch );
Plist-> insertitem (n, strdirivename );

// Obtain the drive type
Uint ndrivetype = getdrivetype (strdirivename );
Cstring strdirivetype = _ T ("");
If (ndrivetype = drive_unknown)
{
Strdirivetype = _ T ("unknown ");
}
Else if (ndrivetype = drive_no_root_dir)
{
Strdirivetype = _ T ("invalid path ");
}
Else if (ndrivetype = drive_removable)
{
Strdirivetype = _ T ("Removable Drive ");
}
Else if (ndrivetype = drive_fixed)
{
Strdirivetype = _ T ("fixed drive ");
}
Else if (ndrivetype = drive_remote)
{
Strdirivetype = _ T ("remote (network) Drive ");
}
Else if (ndrivetype = drive_cdrom)
{
Strdirivetype = _ T ("CDROM Drive ");
}
Else if (ndrivetype = drive_ramdisk)
{
Strdirivetype = _ T ("RAM disk ");
}
Plist-> setitemtext (n, 1, strdirivetype );

// Obtain the drive volume label
Cstring strvolumename = _ T ("");
Getvolumeinformation (strdirivename, strvolumename. getbuffer (1024 ),
1024, null, 0 );
Strvolumename. releasebuffer ();
Plist-> setitemtext (n, 2, strvolumename );

// Obtain the drive serial number
DWORD dwserialnumber = 0;
Cstring strvolumename = _ T ("");
Getvolumeinformation (strdirivename, null,
0, & dwserialnumber, null, 0 );
Cstring strserialnumber = _ T ("");
Strserialnumber. Format (_ T ("% 04x-% 04x "),
Hiword (dwserialnumber), loword (dwserialnumber ));
Plist-> setitemtext (n, 3, strserialnumber );

// Obtain the drive File System
Cstring strfilesystemname = _ T ("");
Getvolumeinformation (strdirivename, null, 0, null,
Strfilesystemname. getbuffer (1024), 1024 );
Strfilesystemname. releasebuffer ();
Plist-> setitemtext (n, 1, strfilesystemname );

// Obtain disk space information
Ularge_integer freebytes;
Ularge_integer totalbytes;
If (! Getdiskfreespaceex (strdirivename, & freebytes,
& Totalbytes, null ))
{
Return;
}

Uint nfreesize = (uint) (freebytes. quadpart/1024/1024 );
Uint ntotalsize = (uint) (totalbytes. quadpart/1024/1024 );

Cstring strtext = _ T ("");
Strtext. Format (_ T ("% d MB"), nfreesize );
Plist-> setitemtext (n, 5, strtext );
Strtext. Format (_ T ("% d MB"), ntotalsize );
Plist-> setitemtext (n, 6, strtext );

N ++;
}

Dwbitmask/= 2;

Ch ++;
}
}