GL_EXT_semaphore_win32
http://www.opengl.org/registry/specs/EXT/external_objects_win32.txt
GL_EXT_semaphore_win32

	void glImportSemaphoreWin32HandleEXT (GLuint semaphore, GLenum handleType, void *handle)
	void glImportSemaphoreWin32NameEXT (GLuint semaphore, GLenum handleType, const void *name)