[MFC] Simplified MFC Structure

MyFC.zip

MyFC.h

#pragma once

#include <windows.h>
#include <tchar.h>

#ifndef AFXAPI
#define AFXAPI __stdcall
#endif

////////////////////////////////////////

class CFrameWnd
{
public:
    CFrameWnd();
    BOOL Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName);
    BOOL ShowWindow(int nCmdShow);
    void UpdateWindow();
private:
    HWND m_hWnd;
};

////////////////////////////////////////

class CWinApp
{
public:
    CWinApp();
    virtual BOOL InitInstance();
    virtual int Run();
    CFrameWnd* m_pMainWnd;
};

////////////////////////////////////////

MyFC.cpp

#include "MyFC.h"

////////////////////////////////////////

int AFXAPI AfxWinMain(HINSTANCE, HINSTANCE, LPTSTR, int);
CWinApp* AFXAPI AfxGetApp();
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

////////////////////////////////////////

HINSTANCE g_hInstance = NULL;
CWinApp* afxCurrentWinApp = NULL;
CFrameWnd* afxCurrentFrameWnd = NULL;

////////////////////////////////////////

int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
    return AfxWinMain(hInstance, hPrevInstance, lpCmdLine, nCmdShow);
}

int AFXAPI AfxWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
    g_hInstance = hInstance;
    int nReturnCode = -1;

    CWinApp* pApp = AfxGetApp();

    if (afxCurrentWinApp != NULL)
    {
        pApp->InitInstance();

        if (afxCurrentFrameWnd != NULL)
        {
            nReturnCode = pApp->Run();
        }
    }

    return nReturnCode;
}

////////////////////////////////////////

CWinApp* AFXAPI AfxGetApp()
{
    return afxCurrentWinApp;
}

////////////////////////////////////////

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }

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

////////////////////////////////////////

CFrameWnd::CFrameWnd()
{
    afxCurrentFrameWnd = this;
}

BOOL CFrameWnd::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName)
{
    TCHAR szClass[100];
    TCHAR szTitle[100];

    lstrcpy(szClass, lpszClassName);
    lstrcpy(szTitle, lpszWindowName);

    WNDCLASSEX wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = (WNDPROC)WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = g_hInstance;
    wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = szClass;
    wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    ::RegisterClassEx(&wcex);

    m_hWnd = ::CreateWindowEx(NULL, szClass, szTitle, WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
        NULL, NULL, g_hInstance, NULL);

    return TRUE;
}

BOOL CFrameWnd::ShowWindow(int nCmdShow)
{
    return ::ShowWindow(m_hWnd, nCmdShow);
}

void CFrameWnd::UpdateWindow()
{
   ::UpdateWindow(m_hWnd);
}

////////////////////////////////////////

CWinApp::CWinApp()
{
    afxCurrentWinApp = this;
}

BOOL CWinApp::InitInstance()
{
    return TRUE;
}

int CWinApp::Run()
{
    MSG msg;

    while (::GetMessage(&msg, NULL, 0, 0))
    {
        ::TranslateMessage(&msg);
        ::DispatchMessage(&msg);
    }

    return (int)msg.wParam;
}

////////////////////////////////////////

Program.cpp

#include "MyFC.h"

class CMyWinApp : public CWinApp
{
public:
    BOOL InitInstance()
    {
        CFrameWnd *pFrameWnd = new CFrameWnd;
        m_pMainWnd = pFrameWnd;
        pFrameWnd->Create(TEXT("MyClass"), TEXT("Hello World~")); // calls ::RegisterClassEx & ::CreateClassEx
        pFrameWnd->ShowWindow(SW_SHOW); // calls ::ShowWindow
        pFrameWnd->UpdateWindow(); // calls ::UpdateWindow

        return TRUE;
    }
};

CMyWinApp theApp;

[MFC] Simplest MFC Program