Hi,
If you mean the multicolumn listbox then you have to create the its property node on the diagram (right click on the item and select "Create->property node" from pop-up menu). Then you have to select two properties:
"Active Cell"
"Cell Background color".
You can do it by expanding prperty node to 2 rows and right clicking on each row. Then select "Properties" from pop-up menu and the appropriate property.
Then you have to set-up "active cell" to the appropriate coordinates of the column header. (row=-1; column=N or column=-2 if you want to change the colors of all headers).
Now you have to connect the appropriate colorbox or numeric variable to "Cell Background color" property node and run the program.
I've attached the example.
Good luck/
Ole
g Chutko.