CComboBox: button access, list problem

[alikalik]

Hello, I need to fill the button in a ComboBox with GradientFill(). How can I access it? And also - how to add borders to the ComboBox when the mouse is over? I looked this: http://www.codeproject.com/KB/combobox/listboxexByEricSanchez.aspx, but there appears an error, when I try to use the simular idea with combo :(