了解一下Windows Cracker

　　Windows Cracker
　　消息拆析宏
　　可以为消息进行参数分解
　　无需记住或查阅资料来了解WParam和lParam的意义
　　可以忘记旧的消息处理方式：switch/case
　　不适合于大型复杂的需要处理大量消息的应用： coding is slow and program debugging and maintenance become slow as the application grows.
　　

　　WindowsX.h
　　包含三种类型的宏： Macro APIs, window message crackers, Control APIs
　　优点：
　　1）减少强制类型转换数量，避免强制类型转换出错；
　　2）程序可读性增强；
　　3）16位和Win32 API之间的转换；
　　4）简便易懂（宏）；
　　5）容易与现存代码结合；
　　6）可用于C语言和C++语言；
　　7）可效仿编制自己的宏；
　　8) 使用这些宏，你不必关心和了解隐含的Windows结构。

　　代码Demo:　

#include <windows.h>
#include <windowsx.h>
#include <tchar.h>
#include <cstdio>
FILE* fp = NULL;

/* BOOL Cls_OnCreate(HWND hwnd, LPCREATESTRUCT lpCreateStruct) */
//#define HANDLE_WM_CREATE(hwnd, wParam, lParam, fn) ((fn)((hwnd), (LPCREATESTRUCT)(lParam)) ? 0L : (LRESULT)-1L)
//#define FORWARD_WM_CREATE(hwnd, lpCreateStruct, fn) (BOOL)(DWORD)(fn)((hwnd), WM_CREATE, 0L, (LPARAM)(LPCREATESTRUCT)(lpCreateStruct))

BOOL fnWndProc_OnCreate(HWND hWnd, LPCREATESTRUCT lpCreateStruct)
{
    fprintf(fp,"  Entering fnWndProc_OnCreate()\n");
    fprintf(fp,"    hWnd = %u\n",(unsigned)hWnd);
    fprintf(fp,"  Leaving fnWndProc_OnCreate()\n\n");

    /*  MSDN states WM_CREATE should return 0 to continue and -1 for failure */
    //return FALSE;

    /*  but the HANDLE_WM_CREATE macro translates return values greater than zero to 0, and the rest to -1. */
    return TRUE;
}

/*  void Cls_OnSize(HWND hwnd, UINT state, int cx, int cy) */
//  #define HANDLE_WM_SIZE(hwnd, wParam, lParam, fn) ((fn)((hwnd), (UINT)(wParam), (int)(short)LOWORD(lParam), (int)(short)HIWORD(lParam)), 0L)
//  #define FORWARD_WM_SIZE(hwnd, state, cx, cy, fn)  (void)(fn)((hwnd), WM_SIZE, (WPARAM)(UINT)(state), MAKELPARAM((cx), (cy)))

void fnWndProc_OnSize(HWND hWnd, UINT state, int cx, int cy)
{
    fprintf(fp,"  Entering fnWndProc_OnSize()\n");
    fprintf(fp,"    Width = %d\tHeight = %d\n",cx,cy);
    fprintf(fp,"  Leaving fnWndProc_OnSize()\n\n");
}

/*  void Cls_OnPaint(HWND hwnd) */
//  #define HANDLE_WM_PAINT(hwnd, wParam, lParam, fn) ((fn)(hwnd), 0L)
//  #define FORWARD_WM_PAINT(hwnd, fn) (void)(fn)((hwnd), WM_PAINT, 0L, 0L)

void fnWndProc_OnPaint(HWND hWnd)
{
    PAINTSTRUCT ps;
    HDC hDC;

    fprintf(fp,"  Entering fnWndProc_OnPaint()\n");
    hDC=BeginPaint(hWnd,&ps);
    fprintf(fp,"    Painting Window!\n");
    fprintf(fp,"    ps.rcPaint.right  = %d\n",(int)ps.rcPaint.right);
    fprintf(fp,"    ps.rcPaint.bottom = %d\n",(int)ps.rcPaint.bottom);
    EndPaint(hWnd,&ps);
    fprintf(fp,"  Leaving fnWndProc_OnPaint()\n\n");
}

/* void Cls_OnClose(HWND hwnd) */
// #define HANDLE_WM_CLOSE(hwnd, wParam, lParam, fn) ((fn)(hwnd), 0L)
// #define FORWARD_WM_CLOSE(hwnd, fn) (void)(fn)((hwnd), WM_CLOSE, 0L, 0L)

void fnWndProc_OnClose(HWND hWnd)
{
    fprintf(fp,"  Entering fnWndProc_OnClose()\n");
    fprintf(fp,"    hWnd = %u\n",(unsigned)hWnd);
    DestroyWindow(hWnd);
    fprintf(fp,"  Leaving fnWndProc_OnClose()\n");
}

/* void Cls_OnDestroy(HWND hwnd) */
//  #define HANDLE_WM_DESTROY(hwnd, wParam, lParam, fn)    ((fn)(hwnd), 0L)
//  #define FORWARD_WM_DESTROY(hwnd, fn)   (void)(fn)((hwnd), WM_DESTROY, 0L, 0L)

void fnWndProc_OnDestroy(HWND hWnd)
{
    fprintf(fp,"    Entering fnWndProc_OnDestroy()\n");
    fprintf(fp,"      hWnd = %u\n",(unsigned)hWnd);
    PostQuitMessage(0);
    fprintf(fp,"    Leaving fnWndProc_OnDestroy()\n");
}

LRESULT CALLBACK fnWndProc(HWND hwnd, unsigned int msg, WPARAM wParam, LPARAM lParam)
{
    switch(msg)
    {
        HANDLE_MSG(hwnd, WM_CREATE,  fnWndProc_OnCreate);
        HANDLE_MSG(hwnd, WM_SIZE,    fnWndProc_OnSize);
        HANDLE_MSG(hwnd, WM_PAINT,   fnWndProc_OnPaint);
        HANDLE_MSG(hwnd, WM_CLOSE,   fnWndProc_OnClose);
        HANDLE_MSG(hwnd, WM_DESTROY, fnWndProc_OnDestroy);
    default:return (DefWindowProc(hwnd, msg, wParam, lParam));
    }
}

int WINAPI WinMain(HINSTANCE hIns, HINSTANCE hPrevIns, LPSTR lpszArgument, int nShow)
{
    TCHAR szClassName[] = _T("Debugging Windows Programs");
    WNDCLASSEX wc;
    MSG messages;
    HWND hWnd;

    wc.lpszClassName = szClassName;                wc.lpfnWndProc=fnWndProc;
    wc.cbSize = sizeof(WNDCLASSEX);                wc.style=CS_DBLCLKS;
    wc.hIcon = LoadIcon(NULL,IDI_APPLICATION);     wc.hInstance=hIns;
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);  wc.hCursor=LoadCursor(NULL,IDC_ARROW);
    wc.hbrBackground = (HBRUSH)COLOR_BTNSHADOW;    wc.cbWndExtra=0;
    wc.lpszMenuName = NULL;                        wc.cbClsExtra=0;
    RegisterClassEx(&wc);
    fp = fopen("Output.txt","w");
    fprintf(fp,"Output.txt Opened In WinMain()\n");
    hWnd = CreateWindowEx(0,szClassName,szClassName,WS_OVERLAPPEDWINDOW,75,75,320,305,HWND_DESKTOP,0,hIns,0);
    ShowWindow(hWnd,nShow);
    while(GetMessage(&messages,NULL,0,0))
    {
        TranslateMessage(&messages);
        DispatchMessage(&messages);
    }
    fprintf(fp,"Output.txt Closed In WinMain()\n");
    fclose(fp);

    return messages.wParam;
}

　　输出Output.txt

Output.txt Opened In WinMain()
  Entering fnWndProc_OnCreate()
    hWnd = 658154
  Leaving fnWndProc_OnCreate()

  Entering fnWndProc_OnSize()
    Width = 304	Height = 267
  Leaving fnWndProc_OnSize()

  Entering fnWndProc_OnPaint()
    Painting Window!
    ps.rcPaint.right  = 304
    ps.rcPaint.bottom = 267
  Leaving fnWndProc_OnPaint()

  Entering fnWndProc_OnClose()
    hWnd = 658154
    Entering fnWndProc_OnDestroy()
      hWnd = 658154
    Leaving fnWndProc_OnDestroy()
  Leaving fnWndProc_OnClose()
Output.txt Closed In WinMain()

　　参考：http://www.cplusplus.com/forum/windows/59737/

　　　　　http://www.softpedia.com/get/Programming/SDK-DDK/Message-Cracker-Wizard.shtml （Message Cracker Wizard）

　　　　   An innovative tool makes every Windows developer forget about the old way of handling messages!

　　　　　百度云：http://pan.baidu.com/s/1dFkTds9%20 密码：8q7o