diff --git a/Nefarius.Peripherals.SerialPort/Win32PInvoke/DCB.cs b/Nefarius.Peripherals.SerialPort/Win32PInvoke/DCB.cs
deleted file mode 100644
index ff3bee2..0000000
--- a/Nefarius.Peripherals.SerialPort/Win32PInvoke/DCB.cs
+++ /dev/null
@@ -1,41 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-
-namespace Nefarius.Peripherals.SerialPort.Win32PInvoke
-{
-    [StructLayout(LayoutKind.Sequential)]
-    internal struct DCB
-    {
-        internal Int32 DCBlength;
-        internal Int32 BaudRate;
-        internal Int32 PackedValues;
-        internal Int16 wReserved;
-        internal Int16 XonLim;
-        internal Int16 XoffLim;
-        internal Byte ByteSize;
-        internal Byte Parity;
-        internal Byte StopBits;
-        internal Byte XonChar;
-        internal Byte XoffChar;
-        internal Byte ErrorChar;
-        internal Byte EofChar;
-        internal Byte EvtChar;
-        internal Int16 wReserved1;
-
-        internal void Init(bool parity, bool outCts, bool outDsr, int dtr, bool inDsr, bool txc, bool xOut,
-                           bool xIn, int rts)
-        {
-            DCBlength = 28; PackedValues = 0x8001;
-            if (parity) PackedValues |= 0x0002;
-            if (outCts) PackedValues |= 0x0004;
-            if (outDsr) PackedValues |= 0x0008;
-            PackedValues |= ((dtr & 0x0003) << 4);
-            if (inDsr) PackedValues |= 0x0040;
-            if (txc) PackedValues |= 0x0080;
-            if (xOut) PackedValues |= 0x0100;
-            if (xIn) PackedValues |= 0x0200;
-            PackedValues |= ((rts & 0x0003) << 12);
-
-        }
-    }
-}
\ No newline at end of file
diff --git a/Nefarius.Peripherals.SerialPort/Win32PInvoke/Win32Com.cs b/Nefarius.Peripherals.SerialPort/Win32PInvoke/Win32Com.cs
index cd2cbb7..9bf4895 100644
--- a/Nefarius.Peripherals.SerialPort/Win32PInvoke/Win32Com.cs
+++ b/Nefarius.Peripherals.SerialPort/Win32PInvoke/Win32Com.cs
@@ -32,9 +32,6 @@ namespace Nefarius.Peripherals.SerialPort.Win32PInvoke
         internal const UInt32 GENERIC_READ = 0x80000000;
         internal const UInt32 GENERIC_WRITE = 0x40000000;
 
-        [DllImport("kernel32.dll")]
-        internal static extern Boolean CloseHandle(IntPtr hObject);
-
         [DllImport("kernel32.dll")]
         internal static extern Boolean GetHandleInformation(IntPtr hObject, out UInt32 lpdwFlags);
 
@@ -42,19 +39,7 @@ namespace Nefarius.Peripherals.SerialPort.Win32PInvoke
         /// <summary>
         /// Manipulating the communications settings.
         /// </summary>
-
-        [DllImport("kernel32.dll")]
-        internal static extern Boolean GetCommState(IntPtr hFile, ref DCB lpDCB);
-
-        [DllImport("kernel32.dll")]
-        internal static extern Boolean GetCommTimeouts(IntPtr hFile, out COMMTIMEOUTS lpCommTimeouts);
-
-        [DllImport("kernel32.dll")]
-        internal static extern Boolean BuildCommDCBAndTimeouts(String lpDef, ref DCB lpDCB, ref COMMTIMEOUTS lpCommTimeouts);
-
-        [DllImport("kernel32.dll")]
-        internal static extern Boolean SetCommState(IntPtr hFile, [In] ref DCB lpDCB);
-
+        
         [DllImport("kernel32.dll")]
         internal static extern Boolean SetCommTimeouts(IntPtr hFile, [In] ref COMMTIMEOUTS lpCommTimeouts);