Version 6.6, Win2000 Professional SP2, Excel 2000

I've read the four posts regarding the topic of 'overflow' and dlls, my problem is somewhat related, but not covered by them.

We have been getting Overflow errors when using an Excel VBA spreadsheet using a CVF compiled dll. The errors occur in sections of the mathematics where an unreasonably large number (> 1e300) may come from iteration.

I've tried 'Stop Always' in the Exceptions, as well as setting the Floating Point Exception handling to zero, in neither case does it interrupt at an infinite value.

I then made some test code like below:

subroutine tst3
real*8 a(10)
integer i,j,k

do i = 100,1000,100
a(1) = 10**(real(i))
enddo

END subroutine tst3

and compiled both as .exe and .dll The .exe breaks when a(1) > 1e300. I wrote a quick VB driver for the .dll, it doesn't break, it simply gives 'Infinity' in the debugger.

Are there any other compiler options to check so we can trap the error before it hangs VB?

Any advice appreciated,
dfh