Introduction
How restart Windows Mobile
device in application.Today, we use Visual Studio 2008 to achieve this function..
Background
Development Net CF application, meets frequently question.
Using the code
Open Visual Studio 2008, choice “File” menu, “New” - “Project”.We will see New
Project dialog box.
In Project types, we choose in Visual Basic Smart Device item.(also choose in
Visual C# Smart Device item).
In the Smart Device
dialog box, we choose Target platform for “Windows Mobile 6 Professional
SDK”,must be explained that the Windows Mobile 6 SDK in
Visual Studio 2008 is
not in the default installation, so you need a separate installation.
Then chooses .NET CF the edition, we choose .NET CF 3.5.What needs to explain,
.NET CF does not have 3.0.This is to maintain consistent with .NET Framework,
after therefore .NET CF 2.0, is .NET CF
3.5.
Finally, we choose create Device Application.
After entering the IDE editio ui, we discovered that the IDE environment has not
had the too big change.We increase two menu items directly in the following menu
“Reset” and “Exit”.
The double click “Exit” the menu, enters the code page.We outside the
MenuItem1_Click function, click on the mouse right key.In the pop-up menu, we
chose "Insert Snippet." Code Snippet is Visual Studio a very useful function,
some useful code fragment preservation is Code Snippet, in needs to use time did
not need everywhere to turn the beforehand code.We want to use restart
Windows Mobile device's code are also
in the VB.NET code fragments.
Select Insert Snippet, there is a list, we successive choice "Smart Devices" -
"Device Operating System" - "Reset the Device."
Insert the Code Snippet, VB.NET code below. Show code, we can see that the
function is called to realize KernelIoControl API function. KernelIoControl
function is used to achieve the common IO control, we can achieve the adoption
of the function of many features, such as access to equipment information, file
systems, and power management.
VB.NET Demo code:
Private 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 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
Private Function ResetPocketPC() As Integer
Const FILE_DEVICE_HAL As Integer = &H101
Const METHOD_BUFFERED As Integer = 0
Const FILE_ANY_ACCESS As Integer = 0
Dim bytesReturned As Integer = 0
Dim IOCTL_HAL_REBOOT As Integer
IOCTL_HAL_REBOOT = 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
After the function foundation completes,we call in the menu method called
ResetPocketPC methods.
Private Sub MenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem1.Click
ResetPocketPC()
End Sub
After compilation run, program run effect like figure above.When we click on the
Reset menu, Windows Mobile device will
restart.
viusal c# demo code:
[DllImport("coredll.dll")]
public static extern int KernelIoControl(int dwIoControlCode, IntPtr lpInBuf, int nInBufSize, IntPtr lpOutBuf, int nOutBufSize,ref int lpBytesReturned);
private int CTL_CODE(int DeviceType, int Func, int Method, int Access)
{
return (DeviceType << 16) | (Access << 14) | (Func << 2) | Method;
}
private int ResetPocketPC()
{
const int FILE_DEVICE_HAL = 0x101;
const int METHOD_BUFFERED = 0;
const int FILE_ANY_ACCESS = 0;
int bytesReturned = 0;
int IOCTL_HAL_REBOOT;
IOCTL_HAL_REBOOT = CTL_CODE(FILE_DEVICE_HAL, 15, METHOD_BUFFERED, FILE_ANY_ACCESS);
return KernelIoControl(IOCTL_HAL_REBOOT, IntPtr.Zero, 0, IntPtr.Zero, 0, ref bytesReturned);
}
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