window always on top and without titlebar

Two questions:
1- Is it possible to make the opengl window always on top(meaning, always on the screen even activating other windows)? It is a vital factor for my project.
2- How to create an opengl window without title bar?

This has nothing to do with opengl… opengl leaves the window handeling to the OS…

What OS do you develop for? windows? then you have information about that in msdn ( its basically a bordeless window that are maximized… and how do you create it without a titlebar? well that depends on how you create it, VLC, MFC pure win32 calls? ( assuming youre on windows now )

How about creating the window using glut as following:

glutInitWindowSize(640, 480);  

/* the window starts at the upper left corner of the screen */
glutInitWindowPosition(0, 0);  

/* Open a window */  
window = glutCreateWindow("OPENGL");  

The answer may be smthg like sizing the window as below.
I do not know anything else to create an opengl panel (or object?) onto a window created with mfc, win32,…etc. I am a beginner.

It is better for me to use glut functions.

My question is living…