compiling gtk-application on Debian

["transnet gmx de" <transnet gmx de>]

Hi,
I am using Debian/Woody and want to compile the gtk-application gqcam.
When I install gqcam as a Debian package it funktions. So I think that gtk+is 
installed properly. 
This is the errormessage:
(none):~/usb/gqcam-0.9# make
gcc `gtk-config --cflags` -DVERSION=\"0.9\" -c gqcam.c
/bin/sh: gtk-config: command not found
gqcam.c:32: gtk/gtk.h: No such file or directory
gqcam.c:36: png.h: No such file or directory
make: *** [gqcam.o] Error 1
Which Debian Packages should I use?
Thanks
Thomas Feldhaus