How to erase backcolor in imagelist?

Hi,all
I attached a ImageList to a ToolBar,but the backcolor is still there,
How do i erase the backcolor in the ToolBar?


Thank you !

have you tryied setting the button's individual's background color. and try setting ImageIndex which you have set to tool bar.

Paresh

does it must change the button's background color at run time ?
if so, what color would i set it?

i set the imagelist's trasparentcolor to the imageitem's background color(all items have the same background color),but it didnot take effort.

why ?


thank you very much