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I need to stop windows from shutting down, but only if <condition>is

true. This is probably an easy thing to do, I looked in help for 30

minutes but couldn't find it.



Thanks in Advance


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"Richard M. Geis" <rmgeis@burnoutboss.com>wrote in message



Look at the QueryUnload event of the Form object. Check out the UnloadMode

and the Cancel parameters.





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"Jeff Johnson [MVP: VB]" <i.get@enough.spam>wrote in message

And realize that if the shutdown has been "forced" then you may not be able

to stop it (and AFAIK you can't detect that except maybe by responding to

the Form_Unload event)



--

Reply to the group so all can participate

VB.Net: "Fool me once..."



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"Richard M. Geis" <rmgeis@burnoutboss.com>wrote in message

Clarification? Are you referring to stopping your application from closing

or stopping "Windows" OS from shutting down?



Gerald





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What I would like is a message box to come up like one does if you try

to shut down windows without saving text in notepad. Of course, one of

the options would stop windows from shuting down (or cancel shut down).



I have the following code in the form (unload) event but it has no

effect on windows shuying down:



Private Sub Form_Unload(Cancel As Integer)

j = 0

For i = 0 To furninst - 1

If furnon(i) = True Or furnwait(i)>0 Then j = j + 1

If furndone(i) = True Then j = j - 1

Next i

If j>0 Then

If MsgBox("Furnace is currently running, close anyway?", vbYesNo,

"Warning") = vbNo Then

Cancel = 1

End If

End If

End Sub



Thanks



Gerald Hernandez wrote:

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"Richard M. Geis" <rmgeis@burnoutboss.com>wrote in message

Cancel from Form_Unload won't stop a shutdown. Move your code to

Form_QueryUnload and try it.



--

Reply to the group so all can participate

VB.Net: "Fool me once..."



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"Richard M. Geis" <rmgeis@burnoutboss.com>wrote in message



You need to move that code to the QueryUnload event and check the UnloadMode

argument to see if Windows is shutting down.



Personally, I would advise against any such prompt unless it would be

detrimental to have Windows close at that particular time. Normally, you

shouldn't interfere with Windows shutting down. If a shutdown would be

detrimental, you should just do whatever you need to properly clean up and

then let Windows continue to shut down.



I can think of no good reason a program should interrupt a shut down except

to prompt to save data which has not been saved. Even security programs like

virus checkers and firewalls don't normally interrupt a shutdown of Windows.





--

Mike

Microsoft MVP Visual Basic





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Thanks for the replies. That did stop windows from shutting down. I

needed to do this because this application runs a furnace through a com

port. I once accidentally shut down windows in the middle of running a

furnace and it took two hours to get back to where I was.



Another interesting note: this dosen't work when running inside of VB,

it has to be compiled and run from the .exe



Thnaks again, and sorry you had to tell me twice.



MikeD wrote:

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