13a14,15
> #define GLEW_STATIC
> 
37a40,47
> struct GLLock{
> 	private:
> 		GLCtrl& ctrl;
> 		bool swap;
> 	public:
> 		GLLock(GLCtrl& glCtrl, bool swapBuffer = false);
> 		~GLLock();
> };
41c51
< 
---
> 	friend class GLLock;