Where is GL_TEXTUREn_ARB defined?

Hey all…I’ve been trying to play around with Multitexturing and I got everything done so far.When I try to compile my app I get an error saying that GL_TEXTURE0_ARB is not defined.I’ve included all the OpenGL header files and I read the papers on how to do multitexturing but none of them tell me where the GL_TEXTUREn_ARB are defined.If it’s not defined anywhere,then how do I define them?
Thanx for your help in advance!

Never mind…I found it.