diff --git a/Makefile b/Makefile
index ebb8aa8..bb9a3fd 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,9 @@ dist:
 	$(LN) -s -- . $(PACKAGE)-$(VERSION)
 	@$(TAR) $(PACKAGE)-$(VERSION).tar.gz -- \
 		$(PACKAGE)-$(VERSION)/data/Makefile \
+		$(PACKAGE)-$(VERSION)/data/Panel.pc.in \
 		$(PACKAGE)-$(VERSION)/data/panel-settings.desktop \
+		$(PACKAGE)-$(VERSION)/data/pkgconfig.sh \
 		$(PACKAGE)-$(VERSION)/data/project.conf \
 		$(PACKAGE)-$(VERSION)/data/16x16/Makefile \
 		$(PACKAGE)-$(VERSION)/data/16x16/panel-applet-bluetooth.png \
diff --git a/data/Makefile b/data/Makefile
index 810cab6..77d6da0 100644
--- a/data/Makefile
+++ b/data/Makefile
@@ -1,29 +1,42 @@
 SUBDIRS	= 16x16 22x22 24x24 32x32 48x48 scalable
-PREFIX	= /usr/local
-DESTDIR	=
 MKDIR	?= mkdir -p
 INSTALL	?= install
 RM	?= rm -f
+TARGETS	= Panel.pc
+PREFIX	= /usr/local
+DESTDIR	=
+RM	?= rm -f
+LN	?= ln -f
+MKDIR	?= mkdir -p
+INSTALL	?= install
 
 
-all: subdirs
+all: subdirs $(TARGETS)
 
 subdirs:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE)) || exit; done
 
+Panel.pc: Panel.pc.in ../config.sh
+	./pkgconfig.sh -P "$(PREFIX)" -- "Panel.pc"
+
 clean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) clean) || exit; done
+	$(RM) -- $(Panel.pc_OBJS)
 
 distclean:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) distclean) || exit; done
+	$(RM) -- $(Panel.pc_OBJS)
+	$(RM) -- $(TARGETS)
 
-install:
+install: $(TARGETS)
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) install) || exit; done
+	./pkgconfig.sh -P "$(DESTDIR)$(PREFIX)" -i -- "Panel.pc"
 	$(MKDIR) $(DESTDIR)$(PREFIX)/share/applications
 	$(INSTALL) -m 0644 -- panel-settings.desktop $(DESTDIR)$(PREFIX)/share/applications/panel-settings.desktop
 
 uninstall:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) uninstall) || exit; done
+	./pkgconfig.sh -P "$(DESTDIR)$(PREFIX)" -u -- "Panel.pc"
 	$(RM) -- $(DESTDIR)$(PREFIX)/share/applications/panel-settings.desktop
 
 .PHONY: all subdirs clean distclean install uninstall
diff --git a/data/Panel.pc.in b/data/Panel.pc.in
new file mode 100644
index 0000000..78c5b50
--- /dev/null
+++ b/data/Panel.pc.in
@@ -0,0 +1,10 @@
+prefix=PREFIX
+includedir=${prefix}/include
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+
+Name: Panel
+Description: DeforaOS Desktop Panel plug-ins
+Version: VERSION
+Requires: gtk+-2.0
+Cflags: -I${includedir}
diff --git a/data/pkgconfig.sh b/data/pkgconfig.sh
new file mode 100755
index 0000000..28210bf
--- /dev/null
+++ b/data/pkgconfig.sh
@@ -0,0 +1,109 @@
+#!/bin/sh
+#$Id$
+#Copyright (c) 2011 Pierre Pronchery <khorben@defora.org>
+#All rights reserved.
+#
+#Redistribution and use in source and binary forms, with or without
+#modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+#DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+#FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+#DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+#SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+#CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+#OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+
+#variables
+PREFIX="/usr/local"
+. "../config.sh"
+DEBUG="_debug"
+DEVNULL="/dev/null"
+INSTALL="install -m 0644"
+MKDIR="mkdir -p"
+RM="rm -f"
+SED="sed"
+
+
+#functions
+#debug
+_debug()
+{
+	echo $@
+	$@
+}
+
+
+#usage
+_usage()
+{
+	echo "Usage: pkgconfig.sh [-i|-u][-P prefix] target" 1>&2
+	return 1
+}
+
+
+#main
+install=0
+uninstall=0
+while getopts iuP: name; do
+	case $name in
+		i)
+			uninstall=0
+			install=1
+			;;
+		u)
+			install=0
+			uninstall=1
+			;;
+		P)
+			PREFIX="$2"
+			;;
+		?)
+			_usage
+			exit $?
+			;;
+	esac
+done
+shift $(($OPTIND - 1))
+if [ $# -eq 0 ]; then
+	_usage
+	exit $?
+fi
+
+PKGCONFIG="$PREFIX/lib/pkgconfig"
+while [ $# -gt 0 ]; do
+	target="$1"
+	shift
+
+	#uninstall
+	if [ "$uninstall" -eq 1 ]; then
+		$DEBUG $RM -- "$PKGCONFIG/$target"		|| exit 2
+		continue
+	fi
+
+	#install
+	if [ "$install" -eq 1 ]; then
+		$DEBUG $MKDIR -- "$PKGCONFIG"			|| exit 2
+		$DEBUG $INSTALL "$target" "$PKGCONFIG/$target"	|| exit 2
+		continue
+	fi
+
+	#create
+	$SED -e "s,PREFIX,$PREFIX," -e "s,VERSION,$VERSION," "$target.in" \
+		> "$target"
+	if [ $? -ne 0 ]; then
+		$RM -- "$target" 2> "$DEVNULL"
+		exit 2
+	fi
+done
diff --git a/data/project.conf b/data/project.conf
index 5ecf70b..4464ef6 100644
--- a/data/project.conf
+++ b/data/project.conf
@@ -1,5 +1,12 @@
 subdirs=16x16,22x22,24x24,32x32,48x48,scalable
-dist=Makefile,panel-settings.desktop
+targets=Panel.pc
+dist=Makefile,Panel.pc.in,panel-settings.desktop,pkgconfig.sh
+
+[Panel.pc]
+type=script
+script=./pkgconfig.sh
+depends=Panel.pc.in,../config.sh
+install=
 
 [panel-settings.desktop]
 install=$(PREFIX)/share/applications
diff --git a/include/Panel.h b/include/Panel.h
index 1f582e8..53c699f 100644
--- a/include/Panel.h
+++ b/include/Panel.h
@@ -60,4 +60,20 @@ struct _PanelApplet
 	void * priv;
 };
 
+typedef enum _PanelMessage
+{
+	PANEL_MESSAGE_SHOW = 0
+} PanelMessage;
+
+typedef enum _PanelMessageShow
+{
+	PANEL_MESSAGE_SHOW_PANEL_BOTTOM = 0x1,
+	PANEL_MESSAGE_SHOW_PANEL_TOP = 0x2,
+	PANEL_MESSAGE_SHOW_SETTINGS = 0x4
+} PanelMessageShow;
+
+
+/* constants */
+# define PANEL_CLIENT_MESSAGE		"DEFORAOS_DESKTOP_PANEL_CLIENT"
+
 #endif /* !DESKTOP_PANEL_H */
diff --git a/src/Makefile b/src/Makefile
index f355b2e..5dc2267 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -49,7 +49,7 @@ window.o: window.c panel.h window.h
 main.o: main.c panel.h ../config.h
 	$(CC) $(panel_CFLAGS) -c main.c
 
-panelctl.o: panelctl.c ../config.h
+panelctl.o: panelctl.c ../include/Panel.h panel.h ../config.h
 	$(CC) $(panelctl_CFLAGS) -c panelctl.c
 
 run.o: run.c
diff --git a/src/panel.c b/src/panel.c
index 99649eb..0f98926 100644
--- a/src/panel.c
+++ b/src/panel.c
@@ -406,13 +406,13 @@ static GdkFilterReturn _event_client_message(XClientMessageEvent * xevent,
 		case PANEL_MESSAGE_SHOW:
 			what = xevent->data.b[1];
 			show = xevent->data.b[2];
-			if(what == PANEL_MESSAGE_SHOW_PANEL_BOTTOM
+			if(what & PANEL_MESSAGE_SHOW_PANEL_BOTTOM
 					&& panel->bottom != NULL)
 				panel_window_show(panel->bottom, show);
-			else if(what == PANEL_MESSAGE_SHOW_PANEL_TOP
+			if(what & PANEL_MESSAGE_SHOW_PANEL_TOP
 					&& panel->top != NULL)
 				panel_window_show(panel->top, show);
-			else if(what == PANEL_MESSAGE_SHOW_SETTINGS)
+			if(what & PANEL_MESSAGE_SHOW_SETTINGS)
 				panel_show_preferences(panel, show);
 			break;
 	}
diff --git a/src/panel.h b/src/panel.h
index 227ceed..964d02e 100644
--- a/src/panel.h
+++ b/src/panel.h
@@ -24,18 +24,6 @@
 
 /* Panel */
 /* types */
-typedef enum _PanelMessage
-{
-	PANEL_MESSAGE_SHOW = 0
-} PanelMessage;
-
-typedef enum _PanelMessageShow
-{
-	PANEL_MESSAGE_SHOW_PANEL_BOTTOM = 0,
-	PANEL_MESSAGE_SHOW_PANEL_TOP,
-	PANEL_MESSAGE_SHOW_SETTINGS
-} PanelMessageShow;
-
 typedef enum _PanelPosition
 {
 	PANEL_POSITION_BOTTOM	= 0x1,
@@ -53,8 +41,6 @@ typedef struct _PanelPrefs
 /* constants */
 # define PANEL_BORDER_WIDTH		4
 
-# define PANEL_CLIENT_MESSAGE		"DEFORAOS_DESKTOP_PANEL_CLIENT"
-
 # define PANEL_CONFIG_FILE		".panel"
 
 # define PANEL_ICON_SIZE_DEFAULT	"panel-large"
diff --git a/src/project.conf b/src/project.conf
index 03e59da..7524a06 100644
--- a/src/project.conf
+++ b/src/project.conf
@@ -31,7 +31,7 @@ ldflags=`pkg-config --libs gtk+-2.0`
 install=$(BINDIR)
 
 [panelctl.c]
-depends=../config.h
+depends=../include/Panel.h,panel.h,../config.h
 
 [run]
 type=binary
diff --git a/src/window.c b/src/window.c
index 7ece3aa..c69e11b 100644
--- a/src/window.c
+++ b/src/window.c
@@ -75,6 +75,7 @@ PanelWindow * panel_window_new(PanelPosition position,
 #if GTK_CHECK_VERSION(2, 6, 0)
 	gtk_window_set_focus_on_map(GTK_WINDOW(panel->window), FALSE);
 #endif
+	gtk_window_set_keep_above(GTK_WINDOW(panel->window), FALSE);
 	gtk_window_set_type_hint(GTK_WINDOW(panel->window),
 			GDK_WINDOW_TYPE_HINT_DOCK);
 	gtk_window_stick(GTK_WINDOW(panel->window));