diff --git a/source/tanya/sys/windows/package.d b/source/tanya/sys/windows/package.d
index f9991a9..9bf1432 100644
--- a/source/tanya/sys/windows/package.d
+++ b/source/tanya/sys/windows/package.d
@@ -16,4 +16,5 @@ version (Windows):
 
 public import tanya.sys.windows.def;
 public import tanya.sys.windows.error;
+public import tanya.sys.windows.wdm;
 public import tanya.sys.windows.winsock2;
\ No newline at end of file
diff --git a/source/tanya/sys/windows/wdm.d b/source/tanya/sys/windows/wdm.d
new file mode 100644
index 0000000..a55a075
--- /dev/null
+++ b/source/tanya/sys/windows/wdm.d
@@ -0,0 +1,37 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Copyright: Eugene Wissner 2017.
+ * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
+ *                  Mozilla Public License, v. 2.0).
+ * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
+ * Source: $(LINK2 https://github.com/caraus-ecms/tanya/blob/master/source/tanya/sys/windows/wdm.d,
+ *                 tanya/sys/windows/wdm.d)
+ */
+module tanya.sys.windows.wdm;
+
+version (Windows):
+
+extern(Windows)
+void RtlCopyMemory(scope void* Destination, 
+                   scope const(void)* Source,
+                   size_t Length) pure nothrow @system @nogc;
+
+extern(Windows)
+void RtlZeroMemory(scope void* Destination, size_t length)
+pure nothrow @system @nogc;
+
+extern(Windows)
+void RtlMoveMemory(scope void* Destination,
+                   scope const(void)* Source,
+                   size_t Length) pure nothrow @system @nogc;
+
+extern(Windows)
+void RtlFillMemory(scope void* Destination, size_t length, char Fill)
+pure nothrow @system @nogc;
+
+extern(Windows)
+void* RtlSecureZeroMemory(return void* ptr, size_t cnt)
+pure nothrow @system @nogc;
\ No newline at end of file