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Is it possible to force Windows CE to reboot from an application?

Posted on 2006-06-09
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Last Modified: 2008-03-17
Hi all,

I want to write a simple app that forces Windows CE 5.0 to reboot?

Any ideas?

Thanks,

James
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Question by:jatkin
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6 Comments
 
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Accepted Solution

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lojk earned 500 total points
ID: 16886699
Straight from the MSDN...

ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.VisualStudio.v80.en/dv_fxnetcf/html/3bff44fb-ce3b-4fbb-9233-d50d77bbf78c.htm

 
Private Const FILE_DEVICE_HAL As Integer = &H101
Private Const METHOD_BUFFERED As Integer = 0
Private Const FILE_ANY_ACCESS As Integer = 0

Private Function CTL_CODE( _
  ByVal DeviceType As Integer, _
  ByVal Func As Integer, _
  ByVal Method As Integer, _
  ByVal Access As Integer) As Integer

    Return (DeviceType << 16) Or (Access << 14) Or (Func << 2) Or Method

End Function

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

Private Function ResetPocketPC() As Integer
    Dim bytesReturned As Integer = 0
    Dim IOCTL_HAL_REBOOT As Integer = CTL_CODE(FILE_DEVICE_HAL, _
      15, METHOD_BUFFERED, FILE_ANY_ACCESS)
    Return KernelIoControl(IOCTL_HAL_REBOOT, IntPtr.Zero, 0, _
      IntPtr.Zero, 0, bytesReturned)
End Function

Private Sub ResetDevice()
    Dim msg As String
    Dim title As String
    Dim style As MsgBoxStyle
    Dim response As MsgBoxResult
    msg = "Are you sure you want to reset the device?"
    style = MsgBoxStyle.DefaultButton2 Or _
       MsgBoxStyle.Question Or MsgBoxStyle.YesNo
    title = "Device Reset"
    response = MsgBox(msg, style, title)
    If response = MsgBoxResult.Yes Then   ' User chose Yes.
       ResetPocketPC()
    End If

End Sub

 
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Author Comment

by:jatkin
ID: 16892616
Hi,

Thanks for the response...
I have compiled the above and it creates an application that runs ok, but when I say 'Yes' it does nothing :-(
Any ideas?
If it helps, it is running on an Arcom Viper running Windows CE 5.0

Thanks,

James
0
 
LVL 4

Author Comment

by:jatkin
ID: 16892669
I have just checked the response from ResetPocketPC() and it is NOT returning True....
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LVL 9

Expert Comment

by:lojk
ID: 16894034
hmm dont know, worked great when tested on the vs2005 Device Emulator, didnt fancy running it on my PDA for testing though...

ResetPocketPC returns an integer value, true is usually -1 so i doubt it would ever return 'true'. What does it actually return?

perhaps...

    If response = MsgBoxResult.Yes Then   ' User chose Yes.
msgbox (       ResetPocketPC())
    End If

might yield a clue..
0
 
LVL 4

Author Comment

by:jatkin
ID: 17056653
The information from lojk looks like it should work fine.
I currently have no way to test it, but I think it is a good answer...

Thanks...

James
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