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watykanczyk/EjectMedia.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Runtime.InteropServices;
+
+internal class EjectMedia
+{
+	private const uint GENERICREAD = 2147483648u;
+
+	private const uint OPENEXISTING = 3u;
+
+	private const uint IOCTL_STORAGE_EJECT_MEDIA = 2967560u;
+
+	private const int INVALID_HANDLE = -1;
+
+	private static IntPtr fileHandle;
+
+	private static uint returnedBytes;
+
+	[DllImport("kernel32", SetLastError = true)]
+	private static extern IntPtr CreateFile(string fileName, uint desiredAccess, uint shareMode, IntPtr attributes, uint creationDisposition, uint flagsAndAttributes, IntPtr templateFile);
+
+	[DllImport("kernel32", SetLastError = true)]
+	private static extern int CloseHandle(IntPtr driveHandle);
+
+	[DllImport("kernel32", SetLastError = true)]
+	private static extern bool DeviceIoControl(IntPtr driveHandle, uint IoControlCode, IntPtr lpInBuffer, uint inBufferSize, IntPtr lpOutBuffer, uint outBufferSize, ref uint lpBytesReturned, IntPtr lpOverlapped);
+
+	public static void Eject(string driveLetter)
+	{
+		try
+		{
+			fileHandle = CreateFile(driveLetter, 2147483648u, 0u, IntPtr.Zero, 3u, 0u, IntPtr.Zero);
+			if ((int)fileHandle != -1)
+			{
+				DeviceIoControl(fileHandle, 2967560u, IntPtr.Zero, 0u, IntPtr.Zero, 0u, ref returnedBytes, IntPtr.Zero);
+			}
+		}
+		catch
+		{
+			throw new Exception(Marshal.GetLastWin32Error().ToString());
+		}
+		finally
+		{
+			CloseHandle(fileHandle);
+			fileHandle = IntPtr.Zero;
+		}
+	}
+}