Alpha base cell

[Andrew Gatt <a gatt btinternet com>]

Hi,

Does anyone know how to make the background of a cell
in a tree view / list store a png file? I would like
to be able to have an alpha channel so the main window
background will still be visible (although faded)
through the cells. I have been trying to use the
pixmap engine in a gtkrc but can't seem to find a
combination that works. I've only been able to change
the colours with 'base = "#ffffff"' etc.

Any ideas?

Andrew