Hard Reset from .NET CF

Have you ever needed to write .NET CF code that forces a device to hard-reset?  Here's my solution:

[DllImport("Coredll.dll")]

extern static int KernelIoControl(int dwIoControlCode, IntPtr lpInBuf, int nInBufSize, IntPtr lpOutBuf, int nOutBufSize , ref int lpBytesReturned );

[DllImport("Coredll.dll")]

extern static void SetCleanRebootFlag();

public

 void HardReset()
{
int IOCTL_HAL_REBOOT = 0x101003C;
int bytesReturned = 0;
SetCleanRebootFlag();
KernelIoControl(IOCTL_HAL_REBOOT, IntPtr.Zero, 0, IntPtr.Zero, 0, ref bytesReturned );
}

[Author: Robert Levy]

Comments

• Anonymous
  April 01, 2004
  I ran across this interesting tidbit of code on the Windows Mobile Team Blog that shows you how to do a hard reset of your mobile device using CF.NET code. It's basically a wrapper around the KernelIoControl function within Coredll.dll....

• Anonymous
  April 03, 2004
  Definitely one to keep out of the hands of children...

• Anonymous
  May 19, 2004
  
  Hi. I copy you hard rest codes to my app and it complied successfully.
  I deploy my application to test PDA. But, It didn't work.
  My hardway is Casio IT-500 PDA with WindowCE4.1.
  please help me.
  

• Anonymous
  May 20, 2004
  Sorry, I haven't looked into do this on devices outside of the Windows Mobile family.

• Anonymous
  October 13, 2005
  This doesn't seem to work on Windows Mobile 5 devices (test on iPAQ hx2190).
  
  The device resets but all the data is left on the device. Perhaps persistent storage is the "culpit"
  
  Any suggestions ?

• Anonymous
  February 26, 2006
  Yes This Works.

• Anonymous
  February 28, 2006
  It worked on a real Qtek 9100 (Wizard) I don't know It will work on the other or not

• Anonymous
  February 28, 2006
  But now it doesn't work, I'm now trying many time, it still doesn't work. It worked only one time, strangly ???

• Anonymous
  March 08, 2006
  This works for the soft reset and not for the hard reset, I tried on Treo-700.
  
  Plz Suggest, if anyone get anything on the hard reset.
  
  With Regards,
  Rakesh Ranjan,
  NJ USA

• Anonymous
  March 08, 2006
  Maybe you do not have .net framework to run your applivcation before hard reset ...

• Anonymous
  July 19, 2006
  it works fine!
  correct hard-reset. :-)

• Anonymous
  September 14, 2006
  Works a treat on a Symbol MC70 - Windows Mobile 5 - said it did a WARM boot - just what I wanted !!

• Anonymous
  September 24, 2006
  Hi how do i use this code butte in VB.net not C#, i have try to convert using some programs butte don't work, pls if you guys have this code in vb.net send to me.
  
  mpires@astralpool.pt
  
  Many tks.
  
  Miguel Pires

• Anonymous
  May 22, 2007
  I want to hard reset my O2 windows mobile how can I do that?Pls suggest

• Anonymous
  June 10, 2007
  With my Symbol MC1000 Windows Mobile 4.2 device this code does a warm boot, not a cold boot. Translated in VB.Net

 Public Declare Function KernelIoControl Lib "coredll.dll" (ByVal dwIoControlCode As Integer, ByVal lpInBuf As IntPtr, ByVal nInBufSize As Integer, ByVal lpOutBuf As IntPtr, ByVal nOutBufSize As Integer, ByRef lpBytesReturned As Integer) As Integer  Public Declare Sub SetCleanRebootFlag Lib "coredll.dll" ()  Public Sub HardReset()    Const IOCTL_HAL_REBOOT As Integer = &H101003C    Dim bytesReturned As Integer = 0    SetCleanRebootFlag()    KernelIoControl(IOCTL_HAL_REBOOT, IntPtr.Zero, 0, IntPtr.Zero, 0, bytesReturned)  End Sub

• Anonymous
  June 22, 2007
  HTC Artemis does only softreset. Anything to keep aware of?

• Anonymous
  July 24, 2007
  Change ur Title... I tried on Symbol MC70 WM5 device...all it does was soft reset not HARD RESET...stop misguiding pple...

• Anonymous
  July 25, 2007
  This hard resets (erases applications and data) on WM Emulator and warm boots on MC9094 device (applications and data intact).

• Anonymous
  August 22, 2007
  Hi i have a mc70 how i run this code in my ppc.. thanks..

• Anonymous
  September 17, 2007
  The VB code definitely does a HARD reset on a Symbol MC50.   Any vb code for a soft-reset? tnx ~j

• Anonymous
  October 22, 2007
  how i have a hard reset5 in the Symbol MC 70.. How i run this code in the Pda.. thank mail me cristonovive@gmail.com

• Anonymous
  November 19, 2007
  I have a MC50 model, but I need a step by step instruction how to get to the DOS prompt to run the script.  Can anyone help me?

• Anonymous
  November 26, 2007
  how i have a hard reset5 in the Symbol MC 70.. How i run this code in the Pda.. thank mail me cristonovive@gmail.com

• Anonymous
  January 15, 2008
  If you're wondering about hard and warm resets read the code and pause for thought: "KernelIoControl(IOCTL_HAL_REBOOT..." does the reset. "SetCleanRebootFlag();" requests hard reset funtionality. I don't think the author is trying to misguide you gizmo

• Anonymous
  January 23, 2008
  The comment has been removed

• Anonymous
  February 05, 2008
  2Jim: Performing a Cold Boot on Symbol MC70: To perform a cold boot simultaneously press the Power button and the 1 and 9 keys.

• Anonymous
  February 05, 2008
  If your device have the same problem after cold rebooting - contact your service center.

• Anonymous
  April 27, 2008
  I am developing an install shiled project for WM5 device installation and would like to restrict .NET CF 2.0 installation during warm boot how do I do it

• Anonymous
  June 09, 2008
  Have any of you guys had any experience of disabling the keys on a symbol MC50 handheld?  This is obviously to stop silly users from loading email, internet and other apps other than my app.... How difficult can it be...  I can't find any data onm this though. kind Regards, Nigel.

• Anonymous
  January 01, 2009
  >>This is obviously to stop silly users from loading email, internet and other apps other than my app.... to disable any other application, you can use AppCenter. You can download it from symbol site (devzone.symbol.com) Also i recommend to read a "Developer guide for Motorola devices".