COL_VALUE
"text", COL_VALUE,
for (i = 0; i < COL_VALUE; i++) {
COL_VALUE, value,
col = gtk_tree_view_get_column(GTK_TREE_VIEW(tree2_w), COL_VALUE);
gtk_tree_model_get(model, &iter, COL_VALUE, &old_def, -1);
if (col == COL_VALUE) {