what is texture management technique? where can i get texture management technique source code?
Aehm, “texture management” is similar to “driving your car”. Everyone has a different way to do that and you should really do it yourself since this is usually designed to fit the application well.
There are some texture managers floating on the web but I don’t think you should blindly use them.
As for management of texture object, I suggest you to visit http://nehe.gamedev.net . Please also click on some banners, this site is very useful for beginners.