仿MFC的消息印射(全局函数的实现)

//弄了个仿MFC消息映射,这是全局函数都好弄,照着MFC就弄出来了,
//在vs2017上可以通过

#include <windows.h>
#include "resource.h"
#include "QDialog.h"
#include "QWinDlg.h"

//全局实例句柄
HINSTANCE g_hInstance;

//函数的前导声明
LRESULT OnInitDialog(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LRESULT OnPaintMain(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LRESULT OnClose(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LRESULT OnDestroy(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LRESULT OnCommand(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LRESULT OnIDOK(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LRESULT OnCancel(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

//定义的函数指针的结构体
struct decodeUINT
{
    UINT uCode;　　//消息号码
    LRESULT(*Fxn)(HWND, UINT, WPARAM, LPARAM);　　//函数指针还是指针函数,有点晕这会
};

//消息映射宏,抄MFC的
#define MAIN_BEGIN_MSG() const struct decodeUINT MainWndMessage[] = {
#define MAIN_END_MSG };

//消息映射数组
MAIN_BEGIN_MSG()
    WM_INITDIALOG,OnInitDialog,
    WM_PAINT,OnPaintMain,
    WM_CLOSE,OnClose,
    WM_DESTROY,OnDestroy,
    WM_COMMAND,OnCommand,
    IDWINOK,OnIDOK,
    IDC_ADD_BTN,OnCancel,
MAIN_END_MSG

//计算消息数组的个数
#define  MAIN_MSG_COUNT sizeof(MainWndMessage) / sizeof(decodeUINT)

//过程函数的声明
INT_PTR CALLBACK WinProc(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

//主函数
int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance,
    _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
{
    g_hInstance = hInstance;
    HWND hWnd = ::CreateDialog(hInstance, (LPCTSTR)IDD_DIALOG1, NULL, WinProc);
    if (hWnd == NULL)
        return 0;

    ShowWindow(hWnd, SW_SHOW);
    UpdateWindow(hWnd);

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

    return 0;
}

//过程函数的实现
INT_PTR CALLBACK WinProc(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{

    //循环查找消息数组中的消息,有就返回执行找到的消息对应的函数
    for (int i = 0;i< MAIN_MSG_COUNT;i++)
    {
        if (uMsg == MainWndMessage[i].uCode)
            return (*MainWndMessage[i].Fxn)(winHwnd, uMsg, wParam, lParam);

    }
//没有找到就返回默认的消息处理函数
    return DefWindowProc(winHwnd, uMsg, wParam, lParam);

    
}

//下面就是各个函数的实现
LRESULT OnInitDialog(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    return 0;
}

 LRESULT OnPaintMain(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    return 0;
}

 LRESULT OnClose(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     DestroyWindow(winHwnd);
     return 1;
 }

 LRESULT OnDestroy(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     PostQuitMessage(0);
     return 0;
 }

 LRESULT OnCommand(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     for (int i = 0; i < MAIN_MSG_COUNT; i++)
     {
//这和上面的循环查找一样,只是条件改为wParam,
         if (LOWORD(wParam) == MainWndMessage[i].uCode)
         {
             return (*MainWndMessage[i].Fxn)(winHwnd, uMsg, wParam, lParam);
         }
     }
     return 1;
 }

 LRESULT OnIDOK(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 { 
     QWinDlg dlg;
     dlg.ShowDialog(winHwnd);
     return 0;
 }
 LRESULT OnCancel(HWND winHwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     return 0;
 }


//这是全局函数都还好说,我想弄成MFC一样的在类中封装成这样的消息映射,就卡壳了,在网上查了许多,
都全是用静态函数来实现的,我在想静态其实也就是全局函数嘛,和这没有多大区别,为啥MFC就能弄出封装到类中的
消息映射机制呢.这下卡就半个多月,没有师父就是这样,没人指点.