Sorry to take so long... After "up 9", "pobj client_data" returns: No symbol "lrecord_type_fc_objectset" in current context. even after sourcing .gdbinit. However, since instance == client_data: (gdb) p *instance $5 = {widget = 0x889d270, parent = 0x88680e0, pop_up_p = 0 '\0', info = 0x888a848, next = 0x0} (gdb) p *(instance->widget) $6 = {core = {self = 0x889d270, widget_class = 0x8513a00, parent = 0x88680e0, xrm_name = 400, being_destroyed = 0 '\0', destroy_callbacks = 0x889f360, constraints = 0x0, x = 0, y = 0, width = 715, height = 24, border_width = 1, managed = 1 '\001', sensitive = 1 '\001', ancestor_sensitive = 1 '\001', event_table = 0x0, tm = {translations = 0x889d248, proc_table = 0x8867d40, current_state = 0x0, lastEventTime = 1208268510}, accelerators = 0x0, border_pixel = 0, border_pixmap = 2, popup_list = 0x0, num_popups = 0, name = 0x86113e5 "menubar", screen = 0x867dbe0, colormap = 32, window = 50332039, depth = 24, background_pixel = 13421772, background_pixmap = 2, visible = 1 '\001', mapped_when_managed = 1 '\001'}} (gdb) p *(instance->info) $7 = {type = 0x888a878 "menubar", name = 0x888a888 "menubar", id = 65537, val = 0x888a898, busy = 0 '\0', pre_activate_cb = 0x823c168 <pre_activate_callback>, selection_cb = 0x8239e62 <popup_selection_callback>, post_activate_cb = 0, instances = 0x889d0f0, next = 0x0} (gdb) p *(instance->parent) $8 = {core = {self = 0x88680e0, widget_class = 0x82a76c0, parent = 0x8867e58, xrm_name = 1092, being_destroyed = 0 '\0', destroy_callbacks = 0x0, constraints = 0x0, x = 0, y = 0, width = 717, height = 855, border_width = 0, managed = 1 '\001', sensitive = 1 '\001', ancestor_sensitive = 1 '\001', event_table = 0x0, tm = {translations = 0x0, proc_table = 0x0, current_state = 0x0, lastEventTime = 0}, accelerators = 0x0, border_pixel = 0, border_pixmap = 2, popup_list = 0x0, num_popups = 0, name = 0x873aa72 "container", screen = 0x867dbe0, colormap = 32, window = 50332038, depth = 24, background_pixel = 14474460, background_pixmap = 2, visible = 1 '\001', mapped_when_managed = 1 '\001'}} (Happy to oblige in any way...) Barry