Why can't i send parameters to an IDC(I.D. Control) I'm programming a MFC project in C++ using Visual Studio. I'm trying to send 2 parameters through an IDC, so the values of these variables can past through other methods, but i keep getting an error message:error C2440: 'static_cast' : cannot convert from 'void (__thiscall CMFC_testDlg::* )(int &,int &)' to 'AFX_PMSG' So I took the "afx_msg" off of the class function in my header file, but it still doesn't work. It keeps referring back to this line of code in my Message Map: "ON_BN_CLICKED(IDC_Multiply, OnBnClickedMultiply)" What could I do to pass parameters to a Control, or is it just not possible? Let me know if you need anymore info to help me out. Thankx In Advance!!!