diff --git a/ChangeLog b/ChangeLog
index 3ad11dc..f2427ad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2005-07-01  Lucas Rocha  <lucasr@cvs.gnome.org>
+
+	* src/tree.c, src/option.c, src/zenity.h: new
+	--hide-column option. Uses the same syntax of
+	--print-column option. 
+
 2005-06-30  Lucas Rocha  <lucasr@cvs.gnome.org>
 
 	* src/tree.c: some data structure improvements.
diff --git a/src/option.c b/src/option.c
index a167488..b4d35bc 100644
--- a/src/option.c
+++ b/src/option.c
@@ -66,6 +66,7 @@ gchar  **zenity_list_columns;
 gboolean zenity_list_checklist;
 gboolean zenity_list_radiolist;
 gchar   *zenity_list_print_column;
+gchar   *zenity_list_hide_column;
 
 /* Notification Dialog Options */
 gboolean zenity_notification_active;
@@ -443,6 +444,15 @@ GOptionEntry list_options[] = {
     N_("Print a specific column (Default is 1. 'ALL' can be used to print all columns)"),
     NULL
   },
+  {
+    "hide-column",
+    '\0',
+    0,
+    G_OPTION_ARG_STRING,
+    &zenity_list_hide_column,
+    N_("Hide a specific column"),
+    NULL
+  },
   { 
     NULL 
   } 
@@ -699,6 +709,8 @@ zenity_option_free (void) {
     g_strfreev (zenity_list_columns);
   if (zenity_list_print_column)
     g_free (zenity_list_print_column);
+  if (zenity_list_hide_column)
+    g_free (zenity_list_hide_column);
 
   g_option_context_free (ctx);
 }
@@ -831,6 +843,7 @@ zenity_list_pre_callback (GOptionContext *context,
   zenity_list_checklist = FALSE;
   zenity_list_radiolist = FALSE;
   zenity_list_print_column = NULL;
+  zenity_list_hide_column = NULL;
 
   return TRUE;
 }
@@ -1090,6 +1103,7 @@ zenity_list_post_callback (GOptionContext *context,
     results->tree_data->multi = zenity_general_multiple;
     results->tree_data->editable = zenity_general_editable;
     results->tree_data->print_column = zenity_list_print_column;
+    results->tree_data->hide_column = zenity_list_hide_column;
     results->tree_data->separator = zenity_general_separator;
   } else {
     if (zenity_list_columns)
@@ -1107,6 +1121,10 @@ zenity_list_post_callback (GOptionContext *context,
     if (zenity_list_print_column)
       zenity_option_error (zenity_option_get_name (list_options, &zenity_list_print_column),
                            ERROR_SUPPORT);
+
+    if (zenity_list_hide_column)
+      zenity_option_error (zenity_option_get_name (list_options, &zenity_list_hide_column),
+                           ERROR_SUPPORT);
   }
     
   return TRUE;
diff --git a/src/tree.c b/src/tree.c
index ea2ba9e..57e8128 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -37,8 +37,10 @@ static GSList *selected;
 static gchar *separator;
 static gboolean print_all_columns = FALSE;
 static gint *print_columns = NULL;
+static gint *hide_columns = NULL;
 
 static int *zenity_tree_extract_column_indexes (char *indexes, gint n_columns);
+static gboolean zenity_tree_column_is_hidden (gint column_index);
 static void zenity_tree_dialog_response (GtkWidget *widget, int response, gpointer data);
 static void zenity_tree_row_activated (GtkTreeView *tree_view, GtkTreePath *tree_path, 
                                        GtkTreeViewColumn *tree_col, gpointer data);
@@ -309,6 +311,9 @@ zenity_tree (ZenityData *data, ZenityTreeData *tree_data)
     print_columns[1] = 0;
   }
 
+  if (tree_data->hide_column) 
+    hide_columns = zenity_tree_extract_column_indexes (tree_data->hide_column, n_columns);
+
   if (n_columns == 0) {
     g_printerr (_("No column titles specified for List dialog.\n")); 
     data->exit_code = zenity_util_return_exit_code (ZENITY_ERROR);
@@ -421,18 +426,20 @@ zenity_tree (ZenityData *data, ZenityTreeData *tree_data)
                                                              "text", column_index, 
                                                              "editable", n_columns, 
                                                              NULL);
-          } 
-          else  {
-            column = gtk_tree_view_column_new_with_attributes (tmp->data, 
-                                                               gtk_cell_renderer_text_new (), 
-                                                               "text", column_index, 
-                                                               NULL);
-          }
+        } 
+        else  {
+          column = gtk_tree_view_column_new_with_attributes (tmp->data, 
+                                                             gtk_cell_renderer_text_new (), 
+                                                             "text", column_index, 
+                                                             NULL);
+        }
 
         gtk_tree_view_column_set_sort_column_id (column, column_index);
         gtk_tree_view_column_set_resizable (column, TRUE);
       }
-                        
+      if (zenity_tree_column_is_hidden (1))
+        gtk_tree_view_column_set_visible (column, FALSE);
+ 
       first_column = TRUE;
     }
     else {
@@ -459,6 +466,9 @@ zenity_tree (ZenityData *data, ZenityTreeData *tree_data)
 
       gtk_tree_view_column_set_sort_column_id (column, column_index);
       gtk_tree_view_column_set_resizable (column, TRUE);
+
+      if (zenity_tree_column_is_hidden (column_index + 1))
+        gtk_tree_view_column_set_visible (column, FALSE);
     }
         
     gtk_tree_view_append_column (GTK_TREE_VIEW (tree_view), column);
@@ -564,6 +574,7 @@ zenity_tree_dialog_output (void)
   }
 
   g_free (print_columns);
+  g_free (hide_columns);
   g_free (separator);
   g_slist_foreach (selected, (GFunc) g_free, NULL);
   selected = NULL;
@@ -627,6 +638,19 @@ zenity_tree_row_activated (GtkTreeView *tree_view, GtkTreePath *tree_path,
   gtk_main_quit ();
 }
 
+static gboolean
+zenity_tree_column_is_hidden (gint column_index)
+{
+  gint i;
+
+  if (hide_columns != NULL)
+    for (i = 0; hide_columns[i] != 0; i++)
+      if (hide_columns[i] == column_index)
+        return TRUE;
+
+  return FALSE;
+}
+
 static gint *
 zenity_tree_extract_column_indexes (char *indexes, int n_columns)
 {
diff --git a/src/zenity.h b/src/zenity.h
index 0e1dba1..b224abd 100644
--- a/src/zenity.h
+++ b/src/zenity.h
@@ -97,6 +97,7 @@ typedef struct {
   gboolean      multi;
   gboolean      editable;
   gchar	       *print_column;
+  gchar	       *hide_column;
   const gchar **data;
 } ZenityTreeData;