Array of Structure in Watch Window ?

[eBob.com]

I have an array

Dim FileInfo(MaxFiles) As OFI

of Structure

Structure OFI 'OneFileInfo
Dim Displayed As Boolean
...
Dim Dirname As String
End Structure

Both the array and the structure are declared after the Class
statement but before the first Sub statement.

Sometimes when FileInfo is in the Watch Window clicking on the + sign
in front of FileInfo does nothing. Othertimes it works fine.

Also, sometimes when I have been able to expand the FileInfo array so
that I can see all of the fields of the first element, the Watch
Window will no longer scroll.

Can I ask one more debugging question? (I know that this is not the
VS ng, but my application is VB.Net.) Is there some way to say "just
run flat out until something I am Watching (in the Watch Window)
changes, then stop as if a breakpoint has been hit"?

Thanks, Bob