Eject USB drive

[Dachyon]

Hi All,
I have been trying to find a way to eject a USB mass storage device from my system using C# (WinXP). I found a WinAPI called EjectDiskFromSADrive() in ntmsapi.dll (

http://msdn2.microsoft.com/en-US/library/bb525502.aspx),

however I am having trouble getting it to work.

In my code, I chose to call the Unicode implemetation :-

[DllImport("ntmsapi.dll", CharSet = CharSet.Unicode)]
        public static extern long EjectDiskFromSADriveW(
           [In, MarshalAs(UnmanagedType.LPWStr)] string lpComputerName,
           [In, MarshalAs(UnmanagedType.LPWStr)] string lpAppName,
           [In, MarshalAs(UnmanagedType.LPWStr)] string lpDeviceName,
           [In] int hWnd,
           [In, MarshalAs(UnmanagedType.LPWStr)] string lpTitle,
           [In, MarshalAs(UnmanagedType.LPWStr)] string lpMessage,
           [In] int dwOptions);

Method call :-

long val = EjectDiskFromSADriveW("", "", "\\\\.\\E", 0, "A Title", "A Message", 4);

Returns a value 8242573992334983171 - no idea what that could be...
Has anyone used this API before ?
Thanks in advance,
Dachyon.

 

[Guru7777]

That MSDN says that that function is Vista-only.

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[Zaith]

I'd look at Windows Management Instrumentation (WMI) if I were you.

This guy uses various windows development kits to achieve what you want,

http://www.codeproject.com/csharp/usbeject.asp

though I think WMI might be a better approach if you've got time to figure it out.

 

[JurkMonkey]

Don't you wish you were writing in linux? Then you could say "umount /dev/usb0" and you'd be done...

As for windows, WMI would be the way to go. You may also want to look into the ms ddk (Driver Development Kit) as it may provide some samples of working with USB Devices.

http://www.ubuntu.com/