WGL_I3D_swap_frame_lock https://www.khronos.org/registry/OpenGL/extensions/I3D/WGL_I3D_swap_frame_lock.txt WGL_I3D_swap_frame_lock BOOL wglDisableFrameLockI3D (void) BOOL wglEnableFrameLockI3D (void) BOOL wglIsEnabledFrameLockI3D (BOOL* pFlag) BOOL wglQueryFrameLockMasterI3D (BOOL* pFlag)