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C-/C++-Quelltext

class CWindow
{
protected:

    HWND windowHandle;

public:

    static void RegisterWindowClass(HINSTANCE hInstance)
    {
        WNDCLASSEX wndClass = {
            sizeof(WNDCLASSEX),
            CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW,
            CWindow::MainWindowProc,
            0,
            0,
            hInstance,
            LoadIcon(NULL, IDI_WINLOGO),
            LoadCursor(0, IDC_ARROW),
            (HBRUSH)(COLOR_BTNFACE + 1),
            0,
            TEXT("DemoWindowClass"),
            LoadIcon(NULL, IDI_WINLOGO)
        };

        if(RegisterClassEx(&wndClass) == 0)
        {
            // throw
        }
    };

    CWindow(HINSTANCE hInstance)
    {
        this->windowHandle = CreateWindowEx(
            0,
            TEXT("DemoWindowClass"),
            TEXT("Demo Window"),
            WS_CAPTION | WS_MAXIMIZEBOX | WS_MINIMIZEBOX | WS_SIZEBOX | WS_SYSMENU | WS_VISIBLE,
            0,
            0,
            800,
            600,
            NULL,
            NULL,
            hInstance,
            this);

        if(this->windowHandle == NULL)
        {
            // throw
        }
    };

    virtual ~CWindow(void) {};
    virtual LRESULT OwnWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
    {
        switch(msg)
        {
        case WM_CREATE:
            MessageBox(NULL, TEXT("CWindow WM_CREATE"), TEXT("Info"), MB_OK);
            return 0;

        case WM_CLOSE:
            MessageBox(NULL, TEXT("CWindow WM_CLOSE"), TEXT("Info"), MB_OK);
            PostQuitMessage(0);
            return 0;
        }

        return DefWindowProc(hwnd, msg, wParam, lParam);
    };

    static LRESULT CALLBACK MainWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
    {
        CWindow* window = NULL;

        if(msg == WM_CREATE)
        {
            window = (CWindow*)LPCREATESTRUCT(lParam)->lpCreateParams;
            SetWindowLongPtr(hwnd, GWL_USERDATA, (LONG_PTR)window);
            
            return window->OwnWindowProc(hwnd, msg, wParam, lParam);
        }
        else
        {
            window = (CWindow*)GetWindowLong(hwnd, GWL_USERDATA);

            if(window != NULL)
            {
                return window->OwnWindowProc(hwnd, msg, wParam, lParam);
            }
        }

        return DefWindowProc(hwnd, msg, wParam, lParam);
    }
};

C-/C++-Quelltext

class CTestWindow : public CWindow
{
public:

    CTestWindow(HINSTANCE hInstance) : CWindow(hInstance) {};
    ~CTestWindow(void) {};

    LRESULT OwnWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
    {
        switch(msg)
        {
        case WM_CREATE:
            MessageBox(NULL, TEXT("CTestWindow WM_CREATE"), TEXT("Info"), MB_OK);
            return 0;

        case WM_CLOSE:
            MessageBox(NULL, TEXT("CTestWindow WM_CLOSE"), TEXT("Info"), MB_OK);
            PostQuitMessage(0);
            return 0;
        }

        return DefWindowProc(hwnd, msg, wParam, lParam);
    }
};

C-/C++-Quelltext

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    CWindow::RegisterWindowClass(hInstance);

    CTestWindow testWindow(hInstance);

    MSG msg;
    while(GetMessage(&msg, NULL, 0, 0) != 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0;
}