Why call glutFullScreen() doesn't work in FTN95

I can use both OpenGL classic window or call OpenGL from i=winio@()...(the secon option is better for me because there are more options to manage the window). Because call glutFullScreen doesn't work as a command of OpenGL I have problrm to call FullScreen (what I need). To do it using i=winio@...etc... I have no idea how use it. I obtained some ideas but it doesn't work with opengl (or I can manage to use it); i=winio@('%es^og[DOUBLE]%lw',xo1,yo1,xo2,yo2,opengl_proc,ctrl) is called then next is activated OpenGL machine as CALL INIT. The OpenGL is runing in loop and in the meantime I could use call glutFullScreen but it dosen't work in FTN95 - how to call FulScreen by i=wino@.... and return to window option when OpenGL object are drawing ??? The FullScreen option in classic OpenGL is basic glut option in FTN95 isn't avaliable - it seems that it is huge problem - I have been asking about the solution few times - it is possible to solve the problem....