diff --git a/sdk/include/psdk/versionhelpers.h b/sdk/include/psdk/versionhelpers.h
new file mode 100644
index 00000000000..339a4d0cda4
--- /dev/null
+++ b/sdk/include/psdk/versionhelpers.h
@@ -0,0 +1,156 @@
+/*
+ * versionhelpers.h
+ *
+ * Inline helper functions for Windows version detection
+ *
+ * This file is part of the ReactOS PSDK package.
+ *
+ * Contributors:
+ *   Created by Timo Kreuzer <timo.kreuzer@reactos.org>
+ *
+ * THIS SOFTWARE IS NOT COPYRIGHTED
+ *
+ * This source code is offered for use in the public domain. You may
+ * use, modify or distribute it freely.
+ *
+ * This code is distributed in the hope that it will be useful but
+ * WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
+ * DISCLAMED. This includes but is not limited to warranties of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#pragma once
+#define _versionhelpers_H_INCLUDED_
+
+#include <specstrings.h>
+
+#ifdef __cplusplus
+#define VERSIONHELPERAPI inline bool
+#else
+#define VERSIONHELPERAPI FORCEINLINE BOOL
+#endif
+
+VERSIONHELPERAPI
+IsWindowsVersionOrGreater(WORD wMajorVersion, WORD wMinorVersion, WORD wServicePackMajor)
+{
+    OSVERSIONINFOEXW osvi = { sizeof(osvi), wMajorVersion, wMinorVersion, 0, 0, {0}, wServicePackMajor, 0, 0, 0, 0 };
+    DWORDLONG dwlConditionMask = VerSetConditionMask(0, VER_MAJORVERSION, VER_GREATER_EQUAL);
+    dwlConditionMask = VerSetConditionMask(dwlConditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
+    dwlConditionMask = VerSetConditionMask(dwlConditionMask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
+
+    return VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR, dwlConditionMask) != FALSE;
+}
+
+VERSIONHELPERAPI
+IsWindowsXPOrGreater()
+{
+    return IsWindowsVersionOrGreater(5, 1, 0);
+}
+
+VERSIONHELPERAPI
+IsWindowsXPSP1OrGreater()
+{
+    return IsWindowsVersionOrGreater(5, 1, 1);
+}
+
+VERSIONHELPERAPI
+IsWindowsXPSP2OrGreater()
+{
+    return IsWindowsVersionOrGreater(5, 1, 2);
+}
+
+VERSIONHELPERAPI
+IsWindowsXPSP3OrGreater()
+{
+    return IsWindowsVersionOrGreater(5, 1, 3);
+}
+
+VERSIONHELPERAPI
+IsWindowsVistaOrGreater()
+{
+    return IsWindowsVersionOrGreater(6, 0, 0);
+}
+
+VERSIONHELPERAPI
+IsWindowsVistaSP1OrGreater()
+{
+    return IsWindowsVersionOrGreater(6, 0, 1);
+}
+
+VERSIONHELPERAPI
+IsWindowsVistaSP2OrGreater()
+{
+    return IsWindowsVersionOrGreater(6, 0, 2);
+}
+
+VERSIONHELPERAPI
+IsWindows7OrGreater()
+{
+    return IsWindowsVersionOrGreater(6, 1, 0);
+}
+
+VERSIONHELPERAPI
+IsWindows7SP1OrGreater()
+{
+    return IsWindowsVersionOrGreater(6, 1, 1);
+}
+
+VERSIONHELPERAPI
+IsWindows8OrGreater()
+{
+    return IsWindowsVersionOrGreater(6, 2, 0);
+}
+
+VERSIONHELPERAPI
+IsWindows8Point1OrGreater()
+{
+    return IsWindowsVersionOrGreater(6, 3, 0);
+}
+
+VERSIONHELPERAPI
+IsWindowsThresholdOrGreater()
+{
+    return IsWindowsVersionOrGreater(10, 0, 0);
+}
+
+VERSIONHELPERAPI
+IsWindows10OrGreater()
+{
+    return IsWindowsVersionOrGreater(10, 0, 0);
+}
+
+VERSIONHELPERAPI
+IsWindowsServer()
+{
+    OSVERSIONINFOEXW osvi = { sizeof(osvi), 0, 0, 0, 0, {0}, 0, 0, 0, VER_NT_WORKSTATION };
+    DWORDLONG const dwlConditionMask = VerSetConditionMask(0, VER_PRODUCT_TYPE, VER_EQUAL);
+    return VerifyVersionInfoW(&osvi, VER_PRODUCT_TYPE, dwlConditionMask) == FALSE;
+}
+
+VERSIONHELPERAPI
+IsActiveSessionCountLimited()
+{
+    OSVERSIONINFOEXW osvi = { sizeof(osvi), 0, 0, 0, 0, {0}, 0, 0, 0, 0, 0 };
+    DWORDLONG dwlConditionMask = VerSetConditionMask(0, VER_SUITENAME, VER_AND);
+    BOOL fSuiteTerminal, fSuiteSingleUserTS;
+
+    osvi.wSuiteMask = VER_SUITE_TERMINAL;
+    fSuiteTerminal = VerifyVersionInfoW(&osvi, VER_SUITENAME, dwlConditionMask);
+
+    osvi.wSuiteMask = VER_SUITE_SINGLEUSERTS;
+    fSuiteSingleUserTS = VerifyVersionInfoW(&osvi, VER_SUITENAME, dwlConditionMask);
+
+    return !(fSuiteTerminal & !fSuiteSingleUserTS);
+}
+
+#ifdef __REACTOS__
+VERSIONHELPERAPI
+IsReactOS()
+{
+    // FIXME: Find a better method!
+    WCHAR szWinDir[MAX_PATH];
+    GetWindowsDirectoryW(szWinDir, _countof(szWinDir));
+    return (wcsstr(szWinDir, L"ReactOS") != NULL);
+}
+#endif // __REACTOS__