How to update a grid cell

Hi ho!

I use a wx.grid.Grid for a workflow status view.
Every cell represents a newspaper page and signals its status with a color.

If something changes, the grid's table's GetAttr returns a different attribute.

But the visible attributes change only sometimes 'accidentally' if the cell area must get repainted.
How can I force that immediately?

I tried grid's .Update, .UpdateWindowsUI, .Layout, sending a GridEvent (got no answer to my question on 2005-08-17 what the appropriate arguments would be) - nothing helped.

Please?

Best regards,
Henning Hraban Ramm
Südkurier Medienhaus / MediaPro
Support/Admin/Development Dept.