Check out example codes for "c++ findpattern". It will help you in understanding the concepts better.

Code Example 1

int CompareByteArray(PBYTE ByteArray1, PCHAR ByteArray2, PCHAR Mask, DWORD Length){    DWORD nextStart = 0;    char start = ByteArray2[0];    for (DWORD i = 0; i < Length; i++)    {        if (Mask[i] == '?')        {            continue;        }        if (ByteArray1[i] == start)        {            nextStart = i;        }        if (ByteArray1[i] != (BYTE)ByteArray2[i])        {            return nextStart;        }    }    return -1;} PBYTE FindSignature(LPVOID BaseAddress, DWORD ImageSize, PCHAR Signature, PCHAR Mask){    PBYTE Address = NULL;    PBYTE Buffer = (PBYTE) BaseAddress;     DWORD Length = strlen(Mask);     for (DWORD i = 0; i < (ImageSize - Length); i++)    {        int result = CompareByteArray((Buffer + i), Signature, Mask, Length);        if (result < 0)        {            Address = (PBYTE)BaseAddress + i;            break;        }        else        {            i += result;        }    }     return Address;}

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