exception handing??

[sandy]

A subroutine is nested many levels deep in the call
stack, and is looping on a mathematical calculation. If
the user clicks a command button called cmdStop, you want
the loop to stop executing and return control to the top-
level procedure, just after the call to the next lower
level. How would i do that?
thanks all!!

[Herfried K. Wagner [MVP]]

"sandy" <wa*******@yahoo.com> scripsit:

A subroutine is nested many levels deep in the call
stack, and is looping on a mathematical calculation. If
the user clicks a command button called cmdStop, you want
the loop to stop executing and return control to the top-
level procedure, just after the call to the next lower
level. How would i do that?
thanks all!!

You can set a boolean flag that is checked in the algorithm. If it is
set, you can execute a 'Return'.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Bernie Yaeger]

Hi Sandy,

You'll need a timer to be checking the boolean flag that Herfried mentioned.

HTH,

Bernie Yaeger

"sandy" <wa*******@yahoo.com> wrote in message
news:10****************************@phx.gbl...

A subroutine is nested many levels deep in the call
stack, and is looping on a mathematical calculation. If
the user clicks a command button called cmdStop, you want
the loop to stop executing and return control to the top-
level procedure, just after the call to the next lower
level. How would i do that?
thanks all!!

[Cor]

Sandy is it this what you are searching for?
In your procedure
\\\\
application.doevents
////
Cor
all!!

[Fergus Cooney]

Hi Sandy,

Are you saying that you want the calculation to abort and jump all the way
out again without going back up through the call stack?** If so, you can
enclose the outermost call in a Try..Catch..End Try block and throw an
Exception in the deepest depths.

Regards,
Fergus

** Or at least without you having to add loads of code to guide it back out.

[Herfried K. Wagner [MVP]]

"Cor" <no*@non.com> scripsit:

Sandy is it this what you are searching for?
In your procedure
\\\\
application.doevents
////

This will allow user interaction...

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Cor]

Herfried

\\\\
application.doevents
////

This will allow user interaction...

Message from poster
A subroutine is nested many levels deep in the call
stack, and is looping on a mathematical calculation. If
the user clicks a command button called cmdStop, you want
the loop to stop executing and return control to the top-
level procedure, just after the call to the next lower
level. How would i do that?
thanks all!!

I thought, in every routine applications.doevents
application.doevents
if userhasstopped then exit routine.
I think this stops very fast.
But I can be wrong?
Cor

[Herfried K. Wagner [MVP]]

"Cor" <no*@non.com> scripsit:

Message from poster
A subroutine is nested many levels deep in the call
stack, and is looping on a mathematical calculation. If
the user clicks a command button called cmdStop, you want
the loop to stop executing and return control to the top-
level procedure, just after the call to the next lower
level. How would i do that?
thanks all!!

I thought, in every routine applications.doevents
application.doevents
if userhasstopped then exit routine.
I think this stops very fast.

If the application should allow user interaction, 'Application.DoEvents'
works. As an alternative you can do the calculation in a separate
thread which checks a flag that tells the algorithm to stop.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>