Hi Shachar,
The GroupingGridControl is a column oriented grid. So you cannot set any cell specific properties like backcolor using property settings. To do this, you will have to subscribe the TableControlPrepareViewStyleInfo event (or QueryCellInfo event). In your handler, you check e.Style.CellValue and if this is valid than set e.Style.Backolor to the value you want. Also you can set the one flag value(IsEngineDataSourceChanged) )in the Engine.DataSourceChanged event of the grid and retrive that flag into the QueryCellInfo event for setting the rowcolor/cell color. Here is a minimal sample that shows you "How to change the RowColor/CellColor depends on the cellvalue?"
Sample :
GGCRowBackColor.zipBest regards,
Haneef