diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 6f5189551..8728c997f 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,8 @@
+2006-05-02  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
+
+	* include/errors.h: New file.
+	* include/dshow.h: Include <errors.h>.
+
 2006-05-02  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
 
 	* include/dshow.h: New file.
@@ -17,7 +22,7 @@
 	* include/mprapi.h (RAS_FLAGS_*,PPP_LCP_*,RASCCPCA_* ,PPP_CCP_*,MAX_*,
 	RASPRIV_*,*ADDRESSLEN,MPR_ENABLE_*): Define.
 	* include/mprapi.h (RAS_*_CONDITION): Add enums.
-	* include/mprapi.h <lmcons.h>: For NETBIOS_NAME_LEN, UNLEN, DLEN.
+	* include/mprapi.h: <lmcons.h> for NETBIOS_NAME_LEN, UNLEN, DLEN.
 
 2006-05-02  Dimitri Papadopoulos  <papadopo@users.sourceforge.net>
 
diff --git a/winsup/w32api/include/dshow.h b/winsup/w32api/include/dshow.h
index b8754ba6b..fce9a6124 100644
--- a/winsup/w32api/include/dshow.h
+++ b/winsup/w32api/include/dshow.h
@@ -7,5 +7,6 @@
 #include <evcode.h>
 #include <audevcod.h>
 #include <dvdevcod.h>
+#include <errors.h>
 
 #endif
diff --git a/winsup/w32api/include/errors.h b/winsup/w32api/include/errors.h
new file mode 100644
index 000000000..ee2092932
--- /dev/null
+++ b/winsup/w32api/include/errors.h
@@ -0,0 +1,23 @@
+#ifndef _ERRORS_H
+#define _ERRORS_H
+#if __GNUC__ >=3
+#pragma GCC system_header
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MAX_ERROR_TEXT_LEN 160
+DWORD WINAPI AMGetErrorTextA(HRESULT,CHAR*,DWORD);
+DWORD WINAPI AMGetErrorTextW(HRESULT,WCHAR*,DWORD);
+#ifdef UNICODE
+#define AMGetErrorText AMGetErrorTextW
+#else
+#define AMGetErrorText AMGetErrorTextA
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+#endif