HelpSignature Scanning Problem

#pragma once
#include <Windows.h>
#include <string>

// This is not my dwFindPattern, credits @learn_more for creating this sexy beast
#define INRANGE(x, a, b)    (x >= a && x <= b)
#define getBits( x )    (INRANGE((x&(~0x20)),'A','F') ? ((x&(~0x20)) - 'A' + 0xa) : (INRANGE(x,'0','9') ? x - '0' : 0))
#define getByte( x )    (getBits(x[0]) << 4 | getBits(x[1]))

class CFindPatternEx {
private:
	HANDLE hModule;
	PBYTE Buffer;

	DWORD dwFindPattern(DWORD dwAddress, DWORD dwLength, const char* szPattern)
	{
		const char* pat = szPattern;
		DWORD firstMatch = NULL;
		for (DWORD pCur = dwAddress; pCur < dwLength; pCur++)
		{
			if (!*pat) return firstMatch;
			if (*(PBYTE)pat == '\?' || *(BYTE*)pCur == getByte(pat)) {
				if (!firstMatch) firstMatch = pCur;
				if (!pat[2]) return firstMatch;
				if (*(PWORD)pat == '\?\?' || *(PBYTE)pat != '\?') pat += 3;
				else pat += 2;
			}
			else {
				pat = szPattern;
				firstMatch = 0;
			}
		}
		return NULL;
	}

	DWORD FindPatternSimplified(DWORD dwAddress, DWORD dwLength, const char* szPattern, DWORD Offset) {
		DWORD result = dwFindPattern(dwAddress, dwAddress + dwLength, szPattern);
		PBYTE bresult = (PBYTE)result;
		bresult += Offset;
		if (bresult)
			return *(DWORD*)bresult;
		else
			return 0;
	}
public:
	CFindPatternEx(std::string ModulePath) {
		hModule = CreateFileA(ModulePath.c_str(), GENERIC_READ, // open for reading
			0, // do not share
			NULL, // default security
			OPEN_EXISTING, // existing file only
			FILE_ATTRIBUTE_NORMAL, // normal file
			NULL);


		if (hModule == INVALID_HANDLE_VALUE)
			printf("Failed to open a handle to the dll Error %d\n", GetLastError());


		Buffer = (PBYTE)VirtualAlloc(NULL, GetFileSize(hModule, NULL), MEM_COMMIT, PAGE_EXECUTE_READWRITE);

		if (!Buffer)
			printf("Could not Allocate %d bytes of memory\n", GetFileSize(hModule, NULL));
		else
			printf("Successfully allocated %d bytes of memory\n", GetFileSize(hModule, NULL));

		DWORD dwBytesRead;
		if (ReadFile(hModule, Buffer, GetFileSize(hModule, NULL), &dwBytesRead, NULL))
			printf("Read file, bytes read : %d\n", dwBytesRead);
		else
			printf("Failed to read file Error %d\n", GetLastError());
	}

	~CFindPatternEx() {
		printf("Deconstructor called, cleaning up..\n");
		CloseHandle(hModule);
		VirtualFree(Buffer, NULL, MEM_RELEASE);
	}

	DWORD FindPatternEx(std::string szPattern, DWORD Offset) {
		return FindPatternSimplified((DWORD)Buffer, GetFileSize(hModule, NULL), szPattern.c_str(), Offset);
	}
};