Unique Value renderer without using field

[XavierMauclaire]

Hi
I'd would like to build an unique value renderer based on values not stored in a field.
This values are calculated in memory.
I may store values into a text file and construct a join on the ObjectID but i'd like doing this simpler.
is it possible giving to arcmap the renderer value on demand ?
I'm usin ArcObjects with C#
regards

[FreddieGibson]

Have you tried implementing a custom renderer in ArcObjects?

Creating custom feature renderers

http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#//0001000002vz000000