How to use isNull

Yahoo Archive
1
From what I understand, Progress doesn't really understand a Null value (I assume you are on Progress). In the UI customization, I either user the LEN function or ="" to determine if a field is empty. If you are programming in Progress (as in a BPM), then you can use = ?. The ? is the Progress unknown value.



----- Original Message ----
From: mintokmint <mintokmint@...>
To: vantage@yahoogroups.com
Sent: Wednesday, October 1, 2008 12:15:48 AM
Subject: [Vantage] how to use isNull


when i wrote if not isnull(myvar) then
the complier told no definnation for isnull
how to use it?
anyone help?
many thanks






[Non-text portions of this message have been removed]
2
when i wrote if not isnull(myvar) then
the complier told no definnation for isnull
how to use it?
anyone help?
many thanks
3
If Not myvar Is DBNull.Value ??

--- In vantage@yahoogroups.com, "mintokmint" <mintokmint@...> wrote:
>
> when i wrote if not isnull(myvar) then
> the complier told no definnation for isnull
> how to use it?
> anyone help?
> many thanks
>
4
what do you mean.
myvar is a db value.

--- In vantage@yahoogroups.com, "bw2868bond" <bwalker@...> wrote:
>
> If Not myvar Is DBNull.Value ??
>
> --- In vantage@yahoogroups.com, "mintokmint" <mintokmint@> wrote:
> >
> > when i wrote if not isnull(myvar) then
> > the complier told no definnation for isnull
> > how to use it?
> > anyone help?
> > many thanks
> >
>
5
> > > when i wrote if not isnull(myvar) then
> > > the complier told no definnation for isnull
> > > how to use it?
> > > anyone help?

What development environment are you using? Visual Studio? Crystal? Vantage
VB Forms? Vantage 8.X customization? Where are you trying to test for NULL?

Mark W.