Help How To Compile

bool bCompare(const BYTE* pData, const BYTE* bMask, const char* szMask)
{
	for(;*szMask;++szMask,++pData,++bMask)
		if(*szMask=='x' && *pData!=*bMask ) 
			return false;
	return (*szMask) == NULL;
}

DWORD FindPattern(DWORD dwAddress,DWORD dwLen,BYTE *bMask,char * szMask)
{
	for(DWORD i=0; i < dwLen; i++)
		if( bCompare( (BYTE*)( dwAddress+i ),bMask,szMask) )
			return (DWORD)(dwAddress+i);

	return 0;
}

DWORD Your Address = FindPattern( 0x400000, 0x5000, ( PBYTE )
"\xA1\x00\x00\x00\x00\x83\xEC\x00\x80\x78\x00\x00", "x????xx?xx??" );