Screens flicker when calling glViewport after window style was changed

Screens flicker when calling glViewport after window style was changed

References

Reference NO 1

http://stackoverflow.com/questions/13588629/screens-flicker-when-calling-glviewport-after-window-style-was-changed

Reference NO 2

http://stackoverflow.com/questions/17191521/why-does-the-apparent-resolution-change-when-the-applicationwpf-opengl-enters

Reference NO 3

http://stackoverflow.com/questions/9998935/flickering-on-fullscreen

Reference NO 4

http://stackoverflow.com/questions/18269418/how-do-i-create-one-large-shared-desktop-in-windows

Reference NO 5

http://nehe.gamedev.net/tutorial/creating_an_opengl_window_(win32)/13001/

Reference NO 6

http://www.loria.fr/~roegel/cours/iut/opengl/addison.pdf

Reference NO 7

http://math.hws.edu/bridgeman/courses/324/s06/doc/opengl.html

Reference NO 8

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