private: class QOpenGLVersionFunctionsBackend * __thiscall QOpenGLContext::functionsBackend(struct QOpenGLVersionStatus const &)const

Mangled name

?functionsBackend@QOpenGLContext@@ABEPAVQOpenGLVersionFunctionsBackend@@ABUQOpenGLVersionStatus@@@Z

Exported by

size	filename	version
3052032	Qt5Gui.dll	5.1.0.0