Use 32bit helper to interact between 32bit processes

QuickLook.Native/QuickLook.Native32/WoW64HookHelper.cpp

@@ -0,0 +1,54 @@
+#include "stdafx.h"
+#include "WoW64HookHelper.h"
+
+#define HELPER_FILE L"\\QuickLook.WoW64HookHelper.exe"
+#define RUN_ARG L"033A853A-E4B2-4552-9A91-E88789761C48"
+
+HANDLE hHelper = nullptr;
+HANDLE hJob = nullptr;
+
+bool WoW64HookHelper::CheckStatus()
+{
+	DWORD running = -1;
+	GetExitCodeProcess(hHelper, &running);
+	return running == STILL_ACTIVE;
+}
+
+bool WoW64HookHelper::Launch()
+{
+	if (CheckStatus())
+		return true;
+
+	createJob();
+
+	WCHAR fullPath[MAX_PATH] = {'\0'};
+	GetModuleFileName(nullptr, fullPath, MAX_PATH - 1);
+	auto p = wcsrchr(fullPath, L'\\');
+	memcpy(p, HELPER_FILE, wcslen(HELPER_FILE) * sizeof WCHAR);
+
+	STARTUPINFO si = {'\0'};
+	PROCESS_INFORMATION pi = {nullptr};
+	si.cb = sizeof si;
+
+	CreateProcess(fullPath, RUN_ARG, nullptr, nullptr, false, 0, nullptr, nullptr, &si, &pi);
+	hHelper = pi.hProcess;
+
+	AssignProcessToJobObject(hJob, hHelper);
+
+	return CheckStatus();
+}
+
+void WoW64HookHelper::createJob()
+{
+	if (hJob != nullptr)
+		return;
+
+	hJob = CreateJobObject(nullptr, nullptr);
+
+	JOBOBJECT_BASIC_LIMIT_INFORMATION BasicLimitInformation = {'\0'};
+	BasicLimitInformation.LimitFlags = JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE;
+	JOBOBJECT_EXTENDED_LIMIT_INFORMATION lpJobObjectInfo = {'\0'};
+	lpJobObjectInfo.BasicLimitInformation = BasicLimitInformation;
+
+	SetInformationJobObject(hJob, JobObjectExtendedLimitInformation, &lpJobObjectInfo, sizeof JOBOBJECT_EXTENDED_LIMIT_INFORMATION);
+}