Causes of Application Hangs

Is there a list anywhere of causes of application hangs? By hangs I mean an
app that is unresponsible to any mouse or keyboard interaction and will not
auto-redraw. A ctrl-alt-del shows the app running at nearly 100% CPU and a
forceful kill is the only way to pacify your PC?

I have a fairly intensive application which will hang at random intervals
(sometimes can take minutes, sometimes can take days).

I checked all my Do/While and Do/Until loop conditions and none have an
unexitable condition. Even if it was there, wouldn't the DoEvents command
from within still keep the app happy?

So, what else could it be? Obviously it's a programming error of some sort
because the software operates just fine with no memory leaks of any sort
normally. It just gets "stuck" in this state and I'd like to know why.

At the very least it would be nice to be *where* the program is stuck when
this happens (which Sub/function, etc..).

Thanks in advance,
Mark


.

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