HOOK.H

/******************************************************************************\ 
*       This is a part of the Microsoft Source Code Samples.  
*       Copyright 1993 - 1998 Microsoft Corporation. 
*       All rights reserved.  
*       This source code is only intended as a supplement to  
*       Microsoft Development Tools and/or WinHelp documentation. 
*       See these sources for detailed information regarding the  
*       Microsoft samples programs. 
\******************************************************************************/ 
 
/*---------------------------------------------------------------------------- 
*|   hook.h    - Windows message spy application                               | 
|                                                                              | 
\*----------------------------------------------------------------------------*/ 
 
#define PUBLIC 
#if !DBG 
#define PRIVATE static 
#else 
#define PRIVATE 
#endif 
 
// special hwnds for the hooks to recognize 
#define HWND_ALL  ((HWND)0xffffffff) 
#define HWND_NULL ((HWND)0L) 
 
#define SPYAPPNAME      "Spy" 
#define SPYCLASSNAME    "Spy Class" 
#define HOOKWINDOWNAME  "SpyHookWindow" 
#define HOOKWINDOWCLASS "SpyHookClass" 
 
 
// 
// Structure that contains the spy message data sent from the hook 
// to the spy app to display.  The hwnd is sent using wParam of 
// the WM_COPYDATA message, and the message number is in the dwData 
// field of the COPYDATASTRUCT.  This structure allows the wParam, 
// lParam and any optional extra data to be passed across. 
// 
typedef struct 
{ 
    WPARAM wParam; 
    LPARAM lParam; 
    BYTE ExtraData[64]; 
} SPYMSGDATA, *PSPYMSGDATA; 
 
 
LRESULT CALLBACK SpyGetMsgProc(INT hc, WPARAM wParam, LPARAM lParam); 
LRESULT CALLBACK SpyCallWndProc(INT hc, WPARAM wParam, LPARAM lParam);