diff --git a/Windows API/GetTokenInformationBufferSize.cpp b/Windows API/GetTokenInformationBufferSize.cpp
new file mode 100644
index 0000000..d34a4f6
--- /dev/null
+++ b/Windows API/GetTokenInformationBufferSize.cpp	
@@ -0,0 +1,9 @@
+DWORD GetTokenInformationBufferSize(HANDLE hToken)
+{
+	PTOKEN_GROUPS TokenGroup = NULL;
+	DWORD dwReturn = ERROR_SUCCESS;
+
+	GetTokenInformation(hToken, TokenGroups, (LPVOID)TokenGroup, 0, &dwReturn);
+
+	return dwReturn;
+}