#include <windows.h>
#include <iostream>

BOOL __stdcall MyGetCurrentProcess (  )
{
	std :: cout << "i have intercepted \n" ;
	
    return TRUE;
}

//----< call interception code >----

BOOL InterceptAPI	(	HMODULE hModule,  
						const char* pccDllName,	/* targeting this system dll */ 
						const char* pccApiName, /* this is the call to be intercepted */
						DWORD dwReplaced		/* replacement function */
					)	
{
    DWORD dwOldProtect ;
    DWORD dwAddressToIntercept = (DWORD) GetProcAddress	(
															GetModuleHandle( (char*)pccDllName ), 
                                                            (char*) pccApiName
														) ;

    BYTE * pbTargetCode = (BYTE *) dwAddressToIntercept;
    BYTE * pbReplaced = (BYTE *) dwReplaced;

	/* to modify, change the protection level */ // Do we need administrator privileges ??
	//////////////////////////////////////////// // why is this not working ??
    VirtualProtect	(	(void *)	dwAddressToIntercept, 
									5, 
									PAGE_WRITECOPY,		/* open this for writing */
									& dwOldProtect		/* save the old state */
					) ;

    * pbTargetCode++ = 0xE9 ;        /* relative jump */
	* ((signed int *)(pbTargetCode)) = pbReplaced - (pbTargetCode + 4 ) ;

	/* set back old protection state */
	///////////////////////////////////
	VirtualProtect	(	(void *) dwAddressToIntercept, 
						5, 
						PAGE_EXECUTE, 
						& dwOldProtect
					) ;

	/* flush the cache and return */
	////////////////////////////////
    FlushInstructionCache ( GetCurrentProcess(), NULL, NULL ) ;
    return TRUE ;
}

//----< Dll Entry Point >----

BOOL __stdcall DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{

	switch ( fdwReason )
	{
		if ( fdwReason == DLL_PROCESS_ATTACH ) 
		{
			InterceptAPI	(	 hinstDLL, 
								"kernel32.dll",				/* targeting this system dll */
								"GetCurrentProcess",		/* this is the call to be intercepted */
								(DWORD) MyGetCurrentProcess	/* replacement function */
							) ;
		}
		else if ( fdwReason == DLL_PROCESS_DETACH ) 
		{    
			// Cleanup
		}
	}
    return TRUE;
}