How to mak cursor position visibl in opengl screen

Hii Friends
I am very new to opengl. Please help me out.
I am using opengl with c on linux system.using windows thier are few tutorials but i want for linux systems…Help me out…
I have done a program which Displays a picture & then i hav created 2 text boxs which asks for input from user. Now in this textbox how to make the cursor visible so tat the user can type the input & its visible on opengl screen with cursor position also…

For Getting user input, we use keyboard func. But now i want the cursor position also to be visible on opengl screen…How is it.

Help me out i am trying it out from past few days not getting it…

As I mentioned in the other thread, I’d just use a simple GL_LINES primitive to draw a line where you want the cursor.

This since when you render the “" character, that apparently isn’t part of the font you’re using. Another option would be to change your font to one that does have the "” character and use that instead.