What is warning "C4090"?

[DelphiCoder]

I have the following function declared:

void RegisterMyClass(HINSTANCE hinst, 
                            WNDPROC wproc, char* clsName)

My window procedure is defined as follows:

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, 
                           WPARAM wParam, LPARAM lParam)
 

I call "RegisterMyClass" declared above as follows:

RegisterMyClass(hInstance, (WNDPROC) WindowProc, 
                           MainWindowClassName);

But Visual C++ gives me this warning on that:
warning C4090: 'function' : different 'const' qualifiers

Any ideas why and how to fix it?

Thanks,

[Banfa]

Different const qualifiers normally means you have used a variable or pointer to a variable declared const where the compiler expected one declared non-const.

I would check your declaration of MainWindowClassName.

[DelphiCoder]

Thanks a lot. I was focusing on the WNDPROC parameter. You are right.