dc.SetPen( wxPen(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW),1, wxSOLID) );
dc.DrawLine( client_width-1, client_height-1, client_width-1, 0 );
dc.DrawLine( client_width-1, client_height-1, 0, client_height-1 );
dc.SetPen( wxPen(wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW),1, wxSOLID) );
dc.DrawLine( client_width-1, client_height-1, client_width-1, 0 );
dc.DrawLine( client_width-1, client_height-1, 0, client_height-1 );