Case sesitive Functions???

Halo ppl, Maybe my doubt is just plain stoopid but i apologize in advance.

i use GLUT with visual studio, However when i compile i get error that the function translate identifier not found
glutsolidsphere(0.25f,20,20);

Hoever when i use uppercase S in functions it compiles and runs, eg, glutSolidSphere(0.25f,20,20);

So are functions case sensitive??

C programming language is case sensitive, so OpenGL is too. Of course i suppose that you are using C, but most languages are case sensitive.

Ahhh yes fflelagund you are definately right. Gracias amigo.