[Shapelib] What format to return null values from character fields

Frank Warmerdam warmerdam at pobox.com
Sat May 6 10:50:43 EDT 2006

Rob Cairns wrote:
> Hi Frank. When returning null values from character fields in a dbf file to 
> e.g. a datagrid object, should these be returned as VT_NULL, VT_EMPTY or 
> empty string ("")? Many Thanks - Rob


The value is notionally NULL so I think returning VT_NULL would be
appropriate.  But then I'm not especially savvy on VB types and semantics.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGF, http://osgeo.org

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