Checking disk usage 1

[xenomage]

Hi all,

it's there any functions that could actually check the disk usage in visual c++.

Any suggestion is welcome. Thanks.

xeno

 

[snuv]

I have used this to get disk space etc if thats what you mean by use

FARPROC pGetDiskFreeSpaceEx = GetProcAddress( GetModuleHandle("kernel32.dll"), "GetDiskFreeSpaceExA");
if (pGetDiskFreeSpaceEx)
{
  unsigned hyper i64FreeBytesAvailable = 0;    // bytes available to caller
  unsigned hyper i64TotalNumberOfBytes = 0;    // bytes on disk
  unsigned hyper i64TotalNumberOfFreeBytes = 0;// free bytes on disk

  if(strcmp(Drive, "") != 0)
  {
    CString strDrive = "C:\\";
    nErrTrap = ::GetDiskFreeSpaceEx(strDrive,(PULARGE_INTEGER)&i64FreeBytesAvailable,
                     (PULARGE_INTEGER)&i64TotalNumberOfBytes, (PULARGE_INTEGER)&i64TotalNumberOfFreeBytes);
    if(!nErrTrap)
      lLastError = GetLastError();
  }
}

Go not to cats for advice for they will just walk over the keyboard

 

[snuv]

please ignore the
if(strcmp(Drive, "&quot != 0)
{
...
...
}
clause
its a code fragment from something else that I was doing


Go not to cats for advice for they will just walk over the keyboard

 

[Rahulc]

Hi snuv:

I couldn't follow the reason why you needed to check the proc address for the API in Visual C++. Please explain.

Thanks in advance.
Rahul

 

[apatterno]

From MSDN:

"Windows 95 OSR2 and later: The GetDiskFreeSpaceEx function is available beginning with Windows 95 OEM Service Release 2 (OSR2). To determine whether GetDiskFreeSpaceEx is available, call GetModuleHandle to get the handle to Kernel32.dll. Then you can call GetProcAddress."

 

[snuv]

Yup

if (pGetDiskFreeSpaceEx)
{
...
}
else
{
  //use GetDiskFreeSpace
}
[\code]

GetDiskFreeSpace() has a limit of 2GB and overflows the values



Go not to cats for advice for they will just walk over the keyboard

 

[xenomage]

Thanks guys, you've been a great help!