C# Signature:

[DllImport("kernel32.dll", SetLastError = true)]
[DllImport("kernel32.dll")]
static extern IntPtr FindFirstVolume([Out] StringBuilder lpszVolumeName,
   uint cchBufferLength);

User-Defined Types:

None.

VB.NET Signature:

  Declare Function FindFirstVolumeW Lib "kernel32.dll" (ByVal lpszVolumeName As System.Text.StringBuilder, ByVal cchBufferLength As UInteger) As IntPtr

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern FindVolumeSafeHandle FindFirstVolume([Out] StringBuilder lpszVolumeName, uint cchBufferLength);
        public static StringCollection GetVolumes()
        {
            const uint N = 1024;
            StringBuilder volume = new StringBuilder((int)N, (int)N);
            StringCollection ret = new StringCollection();
            IntPtr volume_handle = FindFirstVolume(volume, N);
            do
            {
                ret.Add(volume.ToString());

            } while (FindNextVolume(volume_handle, volume, N));
            return ret;
        }

Alternative Managed API:

Do you know one? Please contribute it!

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern bool FindNextVolume(FindVolumeSafeHandle hFindVolume, [Out] StringBuilder lpszVolumeName, uint cchBufferLength);

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern bool FindVolumeClose(IntPtr hFindVolume);

    public class FindVolumeSafeHandle : SafeHandleZeroOrMinusOneIsInvalid
    {
        private FindVolumeSafeHandle()
        : base(true)
        {
        }

        public FindVolumeSafeHandle(IntPtr preexistingHandle, bool ownsHandle)
        : base(ownsHandle)
        {
        SetHandle(preexistingHandle);
        }

        protected override bool ReleaseHandle()
        {
        return FindVolumeClose(handle);
        }
    }

    public static StringCollection GetVolumes()
    {
        const uint bufferLength = 1024;
        StringBuilder volume = new StringBuilder((int)bufferLength, (int)bufferLength);
        StringCollection ret = new StringCollection();

        using (FindVolumeSafeHandle volumeHandle = FindFirstVolume(volume, bufferLength))
        {
        if (volumeHandle.IsInvalid)
        {
            throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());
        }

        do
        {
            ret.Add(volume.ToString());
        } while (FindNextVolume(volumeHandle, volume, bufferLength));

        return ret;
        }
    }

Alternative Managed API:

Do you know one? Please contribute it!

See also:

FindNextVolume

FindVolumeClose

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).