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This code is in Liberty BASIC for demestration purposes only!

//create variable to hold how long the user has used the program for this scession
time1 = 0
//create variable to hold how long the program will run per scession
maxtime = 3

/create a timer that will execute the procedure CheckTrial() every 60 seconds
timer 60000, GoSub CheckTrial()

Procedure CheckTrial starts here
Sub CheckTrial()

//add 312 to the variable time1
time1 = time1 + 312

//if the user has used up all his time for this scession
if ((time1 / 312)  = maxtime)

//let the user know his time expired
MessageBox("Trial Peroid", "You time has expired", 0, 1, 0)

//and terminate the program
end

//Close If Statement
End If

//Code Procedure
End Sub

Code: Select all

Procedure mytimer()
  Repeat
  Delay(2000)  ;Sets how often timer is fired off
  MessageRequester("tim3r!","tim3r") ;Remember to press ok, else program wont make new msg box..
ForEver
EndProcedure

timer=CreateThread(@mytimer(),"") ;Timer is now created as a thread..
Delay(10000) ; Halt main program for 10 seconds
KillThread(timer) ;Kills the timer..

Code: Select all

Global time1
time1 = 0
Global maxtime
maxtime = 3

Procedure CheckTrial()
    time1 = time1 + 312
    If ((time1 / 312)  = maxtime)
        MessageRequester("Trial Period", "You time has expired.")
        End
    EndIf
EndProcedure

If OpenWindow(1, 0, 0, 400, 300, #PB_Window_ScreenCentered, "Timer Demo")
    SetTimer_(WindowID(1), 1, 3000, @CheckTrial())
    Repeat
    Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf