Form error handling

[Richard]

The err.raise method does not seem to work and I get a
Visual Basic error message when I trap an error on one
form that is modally opened from another form. When
checking the call stack, there is a [<Non-Basic Code>]
between the two forms. Is it this that is preventing the
err.raise from being passed to the calling form? And if
so, is there a way that this can be resolved? I've checked
the break options, and they are set to Break on Unhandled
Errors.