gtk_tree_view_column_new_with_attributes and G_Type

["chen.shengqi" <chen shengqi connet com tw>]

dear dirs:
    I want to set column color in gtk_tree_view_column_new_with_attributes , in the docs have a example:
 enum { TEXT_COLUMN, COLOR_COLUMN, N_COLUMNS };
 ...
 {
   GtkTreeViewColumn *column;
   GtkCellRenderer   *renderer = gtk_cell_renderer_text_new ();
 
   column = gtk_tree_view_column_new_with_attributes ("Title",
                                                      renderer,
                                                      "text", TEXT_COLUMN,
                                                      "foreground", COLOR_COLUMN,
                                                      NULL);
 }

than what should COLOR_COLUMN's GType be? thanks.