Logging Out

I just found phidget21.h and phidget21.lib from some examples on the phidgets website,

I'm trying to compile it now but there seems to be some incompatibility in the code between the library versions?  I get 3 errors:

--------------------Configuration: PolLib - Win32 Release--------------------
Compiling...
PolLib.cpp

C:\Documents and Settings\William Tang\Desktop\RFID Files\pollginasrc\PollGina\rfidPolLib\PolLib.cpp(86) : error C2660: 'CPhidgetRFID_getOutputState' : function does not take 1 parameters

C:\Documents and Settings\William Tang\Desktop\RFID Files\pollginasrc\PollGina\rfidPolLib\PolLib.cpp(100) : error C2664: 'CPhidget_open' : cannot convert parameter 1 from 'struct _CPhidgetRFID *' to 'struct _CPhidget *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

C:\Documents and Settings\William Tang\Desktop\RFID Files\pollginasrc\PollGina\rfidPolLib\PolLib.cpp(166) : error C2664: 'CPhidget_close' : cannot convert parameter 1 from 'struct _CPhidgetRFID *' to 'struct _CPhidget *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Error executing cl.exe.

rfidPoll.dll - 3 error(s), 0 warning(s)

Hey Amal,

I finally have the log out stuff working except for one thing

I've been using the logging off code you provided via ExitWindows with user32 library.  However when I run it, I get:

Run-time error '453'

Can't find DLL entry point Exit Windows in user32

What's wrong?

Oh got it working :)  Had to use slightly different code than the one you gave me


Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, ByVal dwReserved As Long) As Long

Private Const EWX_LOGOFF = 0
Private Const EWX_FORCE = 4

ExitWindowsEx EWX_LOGOFFF + EWX_FORCE, 0


Edited by willsterstyle - 07 May 2007 at 8:09pm

Hmm yeah, the library makes it's own rules for the ontaglost event. Basically, you'll have to create your own tag detection system. It should be very easy to do, and you could do it in a number of different ways.

One way you could do it would be to create a global variable to store the time and date of the last tag read. On every tag read event, set the global var to the current time and date. Then use a timer set to 1 second to check that global variable against the current time and date using datediff... if you haven't got a new tag read in 3 seconds, then run the log off / lock code.

willsterstyle wrote: is the ontaglost only available for the 2.1 library?

Yes I believe so. I've not used the 2.1 library myself.

willsterstyle wrote: would it be possible to install two libraries and have two separate programs use one of the two?

Hmm, I seriously doubt it... I think the problem is that the drivers and the library are tied too closely together to allow both libraries to work at the same time.