Sets the position of a dialog window on the screen.
dlg_set_pos(handle, x, y)
Move the dialog to position (100, 200)
dlg_set_pos("dialog_123", 100, 200);
dlg_new dlg_init dlg_update dlg_clear
dlg_show dlg_abort
dlg_is_valid dlg_keep_open dlg_callback
dlg_modal dlg_set_resizable dlg_set_pos dlg_set_size dlg_set_btn dlg_set_name dlg_set_color