Filter on Hidden Field

[holograham]

Is it possible to filter on a hidden field?

I have a description field that is hidden and I am trying to add a keyword filter.

Current attempt:

		doSearch = new PickerIcon(PickerIcon.SEARCH, new FormItemClickHandler()
		{  
			public void onFormItemClick(FormItemIconClickEvent event) 
			{
				grid.clearCriteria();
				
				Criteria searchCriteria = new Criteria("Description", descSearch.getValue().toString());
				
				grid.fetchData(searchCriteria);
			}

But this does not appear to work. It seems to work if I use this to filter a visible field.