[Release] Flash fix for old clients.

CFlashFix.h

#pragma once
class CFlashFix
{
	typedef HMODULE(_stdcall* HookLoadLibrary)(_In_ LPCWSTR lpLibFileName,
		_Reserved_ HANDLE hFile,
		_In_ DWORD dwFlags);
public:
	static void Hook();
	static HookLoadLibrary pLoadLibrary;
	static  HMODULE _stdcall LoadLibraryDetour(_In_ LPCWSTR lpLibFileName,
		_Reserved_ HANDLE hFile,
		_In_ DWORD dwFlags);
};

CFlashFix.cpp

#include "pch.h"
#include "CFlashFix.h"
#include <tchar.h>

CFlashFix::HookLoadLibrary CFlashFix::pLoadLibrary;
void CFlashFix::Hook()
{
    auto m = GetModuleHandleA("kernelbase.dll");
    auto proc = GetProcAddress(m, "LoadLibraryExW");
    pLoadLibrary = reinterpret_cast<CFlashFix::HookLoadLibrary>(proc);
    DetourTransactionBegin();
    DetourUpdateThread(GetCurrentThread());
    DetourAttach(&reinterpret_cast<PVOID&>(pLoadLibrary), LoadLibraryDetour);
    DetourTransactionCommit();
}

//Thanks to { Angelius } for the cleaner method.
HMODULE _stdcall CFlashFix::LoadLibraryDetour(LPCWSTR lpLibFileName, HANDLE hFile, DWORD dwFlags)
{
	if (StrStrW(lpLibFileName, L"Flash.ocx"))
		lpLibFileName = L"./Flash.ocx";

    return pLoadLibrary(lpLibFileName, hFile, dwFlags);
}