Showing grid in TreeView widget

[wouter telox net]

Hello,

I've read most of the docs and examples I could find on treeview but I              
was unable to discover how I could enable a grid (when it's called                  
different I mean those light grey lines that surround the cells). I've              
also searched serveral times using google groups but that didn't privide            
me with anything usefull either. I hope here are a few people that do               
know the answer.                                                                    
                                                                                  
Regards,                                                                            
Wouter