diff --git a/include/WinStd/Win.h b/include/WinStd/Win.h
index e97299dc..80de3edb 100644
--- a/include/WinStd/Win.h
+++ b/include/WinStd/Win.h
@@ -40,6 +40,29 @@ template<class _Elem, class _Traits, class _Ax> inline VOID GuidToStringW(_In_ L
 #else
 #define GuidToString GuidToStringA
 #endif
+
+///
+/// Parses string with GUID and stores it to GUID
+///
+/// \param[in ] lpszGuid  String with GUID
+/// \param[out] lpGuid    GUID to store the result to
+///
+BOOL WINSTD_API StringToGuidA(_In_z_ LPCSTR lpszGuid, _Out_ LPGUID lpGuid);
+
+///
+/// Parses string with GUID and stores it to GUID
+///
+/// \param[in ] lpszGuid  String with GUID
+/// \param[out] lpGuid    GUID to store the result to
+///
+BOOL WINSTD_API StringToGuidW(_In_z_ LPCWSTR lpszGuid, _Out_ LPGUID lpGuid);
+
+#ifdef _UNICODE
+#define StringToGuid StringToGuidW
+#else
+#define StringToGuid StringToGuidA
+#endif
+
 template<class _Elem, class _Traits, class _Ax> inline LSTATUS RegQueryStringValue(_In_ HKEY hReg, _In_z_ LPCSTR pszName, _Out_ std::basic_string<_Elem, _Traits, _Ax> &sValue);
 template<class _Elem, class _Traits, class _Ax> inline LSTATUS RegQueryStringValue(_In_ HKEY hReg, _In_z_ LPCWSTR pszName, _Out_ std::basic_string<_Elem, _Traits, _Ax> &sValue);
 template<class _Ty, class _Ax> inline LSTATUS RegQueryValueExA(_In_ HKEY hKey, _In_opt_ LPCSTR lpValueName, __reserved LPDWORD lpReserved, _Out_opt_ LPDWORD lpType, _Out_ std::vector<_Ty, _Ax> &aData);
diff --git a/src/Win.cpp b/src/Win.cpp
index bae94ccf..3a051c43 100644
--- a/src/Win.cpp
+++ b/src/Win.cpp
@@ -21,6 +21,134 @@
 #include "StdAfx.h"
 
 
+//////////////////////////////////////////////////////////////////////
+// StringToGuidA
+//////////////////////////////////////////////////////////////////////
+
+BOOL WINSTD_API StringToGuidA(_In_z_ LPCSTR lpszGuid, _Out_ LPGUID lpGuid)
+{
+    GUID g;
+    LPSTR lpszEnd;
+    unsigned long ulTmp;
+    unsigned long long ullTmp;
+
+    if (!lpszGuid || !lpGuid || *lpszGuid != '{') return FALSE;
+    lpszGuid++;
+
+    g.Data1 = strtoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE) return FALSE;
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ulTmp = strtoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ulTmp > 0xFFFF) return FALSE;
+    g.Data2 = (unsigned short)ulTmp;
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ulTmp = strtoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ulTmp > 0xFFFF) return FALSE;
+    g.Data3 = (unsigned short)ulTmp;
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ulTmp = strtoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ulTmp > 0xFFFF) return FALSE;
+    g.Data4[0] = (unsigned char)((ulTmp >> 8) & 0xff);
+    g.Data4[1] = (unsigned char)( ulTmp       & 0xff);
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ullTmp = _strtoui64(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ullTmp > 0xFFFFFFFFFFFF) return FALSE;
+    g.Data4[2] = (unsigned char)((ullTmp >> 40) & 0xff);
+    g.Data4[3] = (unsigned char)((ullTmp >> 32) & 0xff);
+    g.Data4[4] = (unsigned char)((ullTmp >> 24) & 0xff);
+    g.Data4[5] = (unsigned char)((ullTmp >> 16) & 0xff);
+    g.Data4[6] = (unsigned char)((ullTmp >>  8) & 0xff);
+    g.Data4[7] = (unsigned char)( ullTmp        & 0xff);
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '}') return FALSE;
+    lpszGuid++;
+
+    if (*lpszGuid != 0) return FALSE;
+
+    *lpGuid = g;
+    return TRUE;
+}
+
+
+BOOL WINSTD_API StringToGuidW(_In_z_ LPCWSTR lpszGuid, _Out_ LPGUID lpGuid)
+{
+    GUID g;
+    LPWSTR lpszEnd;
+    unsigned long ulTmp;
+    unsigned long long ullTmp;
+
+    if (!lpszGuid || !lpGuid || *lpszGuid != '{') return FALSE;
+    lpszGuid++;
+
+    g.Data1 = wcstoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE) return FALSE;
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ulTmp = wcstoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ulTmp > 0xFFFF) return FALSE;
+    g.Data2 = (unsigned short)ulTmp;
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ulTmp = wcstoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ulTmp > 0xFFFF) return FALSE;
+    g.Data3 = (unsigned short)ulTmp;
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ulTmp = wcstoul(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ulTmp > 0xFFFF) return FALSE;
+    g.Data4[0] = (unsigned char)((ulTmp >> 8) & 0xff);
+    g.Data4[1] = (unsigned char)( ulTmp       & 0xff);
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '-') return FALSE;
+    lpszGuid++;
+
+    ullTmp = _wcstoui64(lpszGuid, &lpszEnd, 16);
+    if (errno == ERANGE || ullTmp > 0xFFFFFFFFFFFF) return FALSE;
+    g.Data4[2] = (unsigned char)((ullTmp >> 40) & 0xff);
+    g.Data4[3] = (unsigned char)((ullTmp >> 32) & 0xff);
+    g.Data4[4] = (unsigned char)((ullTmp >> 24) & 0xff);
+    g.Data4[5] = (unsigned char)((ullTmp >> 16) & 0xff);
+    g.Data4[6] = (unsigned char)((ullTmp >>  8) & 0xff);
+    g.Data4[7] = (unsigned char)( ullTmp        & 0xff);
+    lpszGuid = lpszEnd;
+
+    if (*lpszGuid != '}') return FALSE;
+    lpszGuid++;
+
+    if (*lpszGuid != 0) return FALSE;
+
+    *lpGuid = g;
+    return TRUE;
+}
+
+
 //////////////////////////////////////////////////////////////////////
 // winstd::win_handle
 //////////////////////////////////////////////////////////////////////