Desktop Functions:

   Smart Device Functions:

Show Recent Changes
Subscribe (RSS)
Misc. Pages
Helpful Tools
Suggested Reading
Website TODO List
Support Forum
Download Visual Studio Add-In

Terms of Use
Privacy Policy
DeviceIOControl (coredll)

coredll is for smart devices, not desktop Windows. Therefore, this information only applies to code using the .NET Compact Framework. To see if information for DeviceIOControl in other DLLs exists, click on Find References to the right.

This function allows you to send and receive data to control certain devices of your CE device.

C# Signature:

[DllImport("coredll.dll", EntryPoint="DeviceIoControl", SetLastError=true)]
        internal static extern int DeviceIoControlCE(
            int hDevice,
            int dwIoControlCode,
            byte[] lpInBuffer,
            int nInBufferSize,
            byte[] lpOutBuffer,
            int nOutBufferSize,
            ref int lpBytesReturned,
            IntPtr lpOverlapped);

VB Signature:

<DllImport("CoreDll.dll")> Function DeviceIoControl(ByVal hDevice As Integer, ByVal dwIoControlCode As Integer, _
                         ByVal lpInBuffer As String, ByVal nInBufferSize As Integer, _
                         ByVal lpOutBuffer() As Byte, ByVal nOutBufferSize As Integer, _
                         ByRef lpBytesReturned As Integer, ByVal lpOverlapped As Integer) As Integer
    End Function

User-Defined Types:


Alternative Managed API:

Do you know one? Please contribute it!



Tips & Tricks:

Please add some!!!

Sample Code:

DeviceIoControlCE(m_hPort, 0x1003, PosX, PosX.Length, outDataX, outDataX.Length, ref xfer, IntPtr.Zero)

/* From Windows Mobile Unified Sensor API ( */

static void DeviceIoControl(int controlCode, int[] inBuffer, int[] outBuffer)
        IntPtr file = NativeMethods.CreateFile("ACS1:", 0, 0, IntPtr.Zero, ECreationDisposition.OpenExisting, 0, IntPtr.Zero);
        if (file == (IntPtr)(-1))
        throw new InvalidOperationException("Unable to Create File");

        int bytesReturned = 0;
        int inSize = sizeof(int) * inBuffer.Length;
        int outSize = sizeof(int) * outBuffer.Length;
        if (!NativeMethods.DeviceIoControl(file, controlCode, inBuffer, inSize, outBuffer, outSize, ref bytesReturned, IntPtr.Zero))
            throw new InvalidOperationException("Unable to perform operation.");

/* From Windows Mobile Unified Sensor API ( */


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).

Access directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version