Timer Class
in [Visual Basic]
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From: Bee on 12 May 2010 21:43 Experimenting with a timer class. The main loop looks like this. Private Sub TimerLoop() Do While Not m_bEnabled = False If GetTickCount - m_lTickCount >= m_lInterval Then RaiseEvent OnTimer m_lTickCount = GetTickCount ElseIf GetTickCount = 0 Then m_lTickCount = 0 ElseIf GetTickCount < m_lTickCount Then m_lTickCount = 0 End If DoEvents Sleep 1& Loop End Sub I added the Sleep because the original code pushed the CPU useage to over 50% for this sub running. Is this how the VB6 Timer control works? (1)Is there a better way? (2) how are timers allocated in windows? i.e. is there a true max? or max per .exe ? I know I have been told to consolidate but that is difficult in some instances. OK, so bottom line is this. I have some hardware interfaces that do not have a way of doing an event like the Serial OnComm does. So I need to make an ActiveX EXE to interface with the manufacturer's .dll. I want the ActiveX EXE to generate an event when there is a data change. The data is sampled in the ActiveX EXE using my timer. I could use a hidden form and a Timer control, but why not use an API like above?
From: Karl E. Peterson on 12 May 2010 21:53
Bee wrote: > Is this how the VB6 Timer control works? No. > (1)Is there a better way? Yes. > (2) how are timers allocated in windows? http://vb.mvps.org/samples/TimerObj > i.e. is there a true max? or max per .exe ? If you have to ask, probably. -- ..NET: It's About Trust! http://vfred.mvps.org |