how to point to a member function in a global function in C++?

Question

Now i am writing a MFC program with opengl in it. And when i tried to combine opengl with MFC, i come across some problems: First, I defined a class named:CSCommTestDlg, and defined a member function with codes as follows: void CSCommTestDlg::OpglMain(int argc, char* argv[]) { glutDisplayFunc(displayCude); } displayCube is also a member function of class CSCommTestDlg, and glutDisplayFunc is a global funcion(an opengl function), the function declarations of glutDisplayFunc is as follows: GLUTAPI void APIENTRY glutDisplayFunc(void (GLUTCALLBACK *func)(void)); Yes, just as you can see, the parameter of glutDisplayFunc is a function pointer, and i made it point to a member function displayCube, which seems illegal, and i got an error like that: error C2664: 'glutDisplayFunc' : cannot convert parameter 1 from 'void (void)' to 'void (__cdecl *)(void)' None of the functions with this name in scope match the target type seems that i can't point to a member function in a global function, but i need it. How to fix it ? JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

glutDisplayFunc takes a global function, so, simply put, you can't make it take a member function pointer. One solution would be to mark displayCube as static, but that kinda ruins the point of having a class in the first place. Another option would be to declare a global function as the glut display callback, and then inside that function, call the displayCube member function of your CSCommTestDlg object - if you can get hold of a global pointer to it.