49   GLuint (GSTGLAPI * CreateProgram) (void);
50   void (GSTGLAPI * DeleteProgram) (GLuint program);  member
51   void (GSTGLAPI * UseProgram) (GLuint program);  member
52   void (GSTGLAPI * GetAttachedShaders) (GLuint program, GLsizei maxcount,  member
55     GLuint (GSTGLAPI * CreateShader) (GLenum shaderType);
56   void (GSTGLAPI * DeleteShader) (GLuint shader);  member
57   void (GSTGLAPI * AttachShader) (GLuint program, GLuint shader);  member
58   void (GSTGLAPI * DetachShader) (GLuint program, GLuint shader);  member
60   void (GSTGLAPI * GetShaderiv) (GLuint program, GLenum pname, GLint * params);  member
61   void (GSTGLAPI * GetProgramiv) (GLuint program, GLenum pname, GLint * params);  member
62   void (GSTGLAPI * GetShaderInfoLog) (GLuint shader, GLsizei maxLength,  member
64   void (GSTGLAPI * GetProgramInfoLog) (GLuint shader, GLsizei maxLength,  member