1st, here is my Code the class Declaration class mWindow { //Set's up Varibles ... ... //tobe Overloaded Functions static bool Close() {return true;} //Runs shutdown Functions bool Init() {return true;}; static bool Render() {return true;} } ok, the three Functions Init() / Close() and Render() are supposed to be overloaded, however ... The Close is called in the WndProc() message loop on WM_DESTROY. and only seems to like it if its static. Here is the Class derived from mWindow, which overloads the Functions class WinSetup : public mWindow { private: public: //Overloaded functions WinSetup(); bool Init(); bool Close(); bool Render(); }; Now the Functions Should to my understanding overload ... and the Init() works perfectly, the problem is with the Render Function is not being called through WndProc(); do i need to overload WndProc? LRESULT CALLBACK mWindow::WndProc(HWND hWnd , UINT Msg, WPARAM wParam, LPARAM lParam) { switch(Msg) { case WM_DESTROY: Close(); PostQuitMessage(WM_QUIT); break; case WM_CREATE: break; case WM_PAINT: Render(); break; default: return DefWindowProc(hWnd, Msg, wParam, lParam); } return 0; }

If you have base class functionality that you want to replace with derived class behavior then you should define the functions as virtual.

with my WndProc, how do i declare it to only use a Specified instance (i have m_hWnd defined as a Member Handle in my mWindow Class seems that this would be the easiest way, i did think that i needed to declare as virtual.


LRESULT CALLBACK mWindow::WndProc(HWND hWnd , UINT Msg, WPARAM wParam, LPARAM lParam)
{
switch(Msg)
{
case WM_DESTROY:
Close();
PostQuitMessage(WM_QUIT);
break;
case WM_CREATE:
break;
case WM_PAINT:
Render();
break;

default:
return DefWindowProc(hWnd, Msg, wParam, lParam);
}
return 0;
}

as I am new to the Win32 API I am not Familiar with other Methods use with message handling

Go read my post in your last thread again.

ok, so what i need to do is :

class myClass
{
void msgHandle(); //Contains code(a)
static LRESULT CALLBACK WndProc(...);
}

//
m_wcex.lpfnWndProc = &msgHandle

Given the fact that won't even compile, that's a no.

Ok, so I read you code, and I think I can understand some(:P) of it
at the moment i get the following errors here

class mWindow
{
public:
//Other code emmited
void WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
static LRESULT CALLBACK StaticWndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
}
LRESULT CALLBACK StaticWndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
if (LONG_PTR user_data = GetWindowLongPtr(hWnd, GWLP_USERDATA))
{
mWindow* this_window = reinterpret_cast<mWindow *>(user_data);
return this_window->WndProc(hWnd, Msg, wParam, lParam); // cannot return this
}
if (Msg == WM_NCCREATE)
{
LPCREATESTRUCT create_struct = reinterpret_cast<LPCREATESTRUCT>(lParam);
void * lpCreateParam = create_struct->lpCreateParams;
mWindow * this_window = reinterpret_cast<mWindow *>(lpCreateParam);
SetWindowLongPtr(hWnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(this_window));
return this_window->WndProc(hWnd, Msg, wParam, lParam); //Cannot return this
}

return DefWindowProc(hWnd, Msg, wParam, lParam);
}

1>c:\users\alex\documents\visual studio 2008\projects\win basics\win basics\mwindow.cpp(102) : error C2440: 'return' : cannot convert from 'void' to 'LRESULT'
1> Expressions of type void cannot be converted to other types
1>c:\users\alex\documents\visual studio 2008\projects\win basics\win basics\mwindow.cpp(110) : error C2440: 'type cast' : cannot convert from 'void' to 'LRESULT'
1> Expressions of type void cannot be converted to other types

You declared your WndProc function as a void return type. That's not right.