Re: [DESPERATE] Turn on/off Bluetooth, WiFi and an RFID tag reader.

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Hi,
Have you registered on the Teknet Psion website, where you can find SDK for specific models?

http://www.psionteklogix.com/public.aspx?s=com&p=TeknetforDevelopers

Alberto Silva
MS Mobile Devices MVP
http://msmvps.com/AlbertoSilva

Psion WorkAbout Pro with Windows CE .NET 4.2

Dealer gave me PowerAPIOn.exe and PowerAPIOff.exe to turn on/off tag
reader, but I want to do it programmatically and do the same with WiFi
and Bluetooth as I can do from Control Panel ("Network and dialup
connections" and "Power").

Googling I've found that I should:

- search all devices in
HKEY_LOCAL_MACHINE / System / CurrentControlSet / Control / POWER /
State / {98C5250D-C29A-4985-AE5F-AFE5367E5006} / <DEVICE_NAME>
I've found no devices under POWER.
In Control Panel I've found that I've a Cambridge Silicon Bluetooth
chip.
Under HKEY_LOCAL_MACHINE/Comm I've found:
- an unknown CF8385PN1 device
- an Agere WLAGS46B1 WiFi compact flash
- use "SetDevicePower" but I don't know <DEVICE_NAME> and Microsoft
discourages application developers from calling this function:
http://msdn2.microsoft.com/en-us/library/ms889607.aspx
- use "SetPowerRequirement" in this way:

[DllImport("coredll.dll", SetLastError = true)]
private static extern IntPtr SetPowerRequirement
(
string pvDevice,
CEDEVICE_POWER_STATE DeviceState,
uint DeviceFlags,
IntPtr pvSystemState,
uint StateFlags
);
...
string deviceName = ...;
CEDEVICE_POWER_STATE deviceState = ...;
uint devFlags = POWER_NAME | POWER_FORCE;
SetPowerRequirement(deviceName, deviceState, devFlags, IntPtr.Zero,
0);
MSDN says "DeviceFlags = Bitwise-or of the following flags
POWER_NAME,
POWER_FORCE".
This mean Bitwise-or of all the flags or Bitwise-or of the needed
ones?
MSDN says "pvDevice Must be a valid LPWSTR device name, for example,
"COM1:". The actual meaning is determined by the DeviceFlags
parameter."
As mentioned above for "SetDevicePower" I don't know <DEVICE_NAME>.
In which way DeviceFLags modify the meaning???
MSDN says "POWER_NAME specifies the name of the device whose power
should
be maintained at or above the DeviceState level."
I've found in Pm.h that POWER_NAME is a DWORD whose value is 1:
how can it specify a name???
Maybe MSDN means that if I use POWER_NAME will be used the name of
the
device that is calling SetPowerRequirement?
If I import the dll why I have to define CEDEVICE_POWER_STATE again
in
C#???


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