LISTFUNC.MDA is a library database that provides a way to add a null entry
to listboxes and combos that are filled from a table or query.

The Problem:  Often it's desirable to allow the user to enter a null value
into a listbox or combo whose Row Source is a table or query, but it's not
always possible.  For example, if a combo has Limit To List set, or its Bound 
Column is different from the column shown in the text portion, then the user 
won't be able to enter a null (unless there's a null entry in the Row Source 
table, which there usually isn't).

The Solution:  A listbox or combo can be filled by an Access Basic function
that uses the table or query Row Source, but adds a null row at the top of
the list.  LISTFUNC.MDA provides such a wrapper function, which can handle
several listboxes and combos at once.

Installation:  To install LISTFUNC.MDA, add the following line to the
[Libraries] section of the msaccess.ini file:
    c:\access\listfunc.mda=ro
Then restart Access.

Use:  First, create a listbox or combo that's filled from a table or query.
Then change the Row Source Type property to "NullListFunc".  Do not change the
Row Source.  The listbox will now have a blank row at the top of the list,
followed by the entries from the Row Source.


Len Popp  71162,3513
