How to display messages/labels inside 3D scene?

I’m working in Borland C++ Builder enviroment.
Im modeling different 3d scenes(geographical areas,landscapes and etc.)
I need to display some label with message or
number on the 3D scene ,but I dont want this text to be projected,just to display as message.
How can I do it?How can I display on the projected scene smth that is not connected to the scene(without any projection)?

you need set up an orthographic projection before you render all your 2D stuff.

look into glOrtho().

render all your 3D stuff using a perspective projection, then switch over to an ortho view and render your labels.