diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 154a91035..44e4cdc15 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -5713,4 +5713,29 @@ HFONT CreateFont(
   <define name="EVENT_E_CANT_MODIFY_OR_DELETE_CONFIGURED_OBJECT" value="0x8004020E"/>
   <define name="EVENT_E_INVALID_EVENT_CLASS_PARTITION" value="0x8004020F"/>
   <define name="EVENT_E_PER_USER_SID_NOT_LOGGED_ON" value="0x80040210"/>
+  <!--WTypes.h: CLSCTX enumeration -->
+  <define name="CLSCTX_INPROC_SERVER" value="0x1"/>
+  <define name="CLSCTX_INPROC_HANDLER" value="0x2"/>
+  <define name="CLSCTX_LOCAL_SERVER" value="0x4"/>
+  <define name="CLSCTX_INPROC_SERVER16" value="0x8"/>
+  <define name="CLSCTX_REMOTE_SERVER" value="0x10"/>
+  <define name="CLSCTX_INPROC_HANDLER16" value="0x20"/>
+  <define name="CLSCTX_RESERVED1" value="0x40"/>
+  <define name="CLSCTX_RESERVED2" value="0x80"/>
+  <define name="CLSCTX_RESERVED3" value="0x100"/>
+  <define name="CLSCTX_RESERVED4" value="0x200"/>
+  <define name="CLSCTX_NO_CODE_DOWNLOAD" value="0x400"/>
+  <define name="CLSCTX_RESERVED5" value="0x800"/>
+  <define name="CLSCTX_NO_CUSTOM_MARSHAL" value="0x1000"/>
+  <define name="CLSCTX_ENABLE_CODE_DOWNLOAD" value="0x2000"/>
+  <define name="CLSCTX_NO_FAILURE_LOG" value="0x4000"/>
+  <define name="CLSCTX_DISABLE_AAA" value="0x8000"/>
+  <define name="CLSCTX_ENABLE_AAA" value="0x10000"/>
+  <define name="CLSCTX_FROM_DEFAULT_CONTEXT" value="0x20000"/>
+  <define name="CLSCTX_ACTIVATE_32_BIT_SERVER" value="0x40000"/>
+  <define name="CLSCTX_ACTIVATE_64_BIT_SERVER" value="0x80000"/>
+  <define name="CLSCTX_ENABLE_CLOAKING" value="0x100000"/>
+  <define name="CLSCTX_APPCONTAINER" value="0x400000"/>
+  <define name="CLSCTX_ACTIVATE_AAA_AS_IU" value="0x800000"/>
+  <define name="CLSCTX_PS_DLL" value="0x80000000"/>
 </def>