Initial commit: ROW Client source code

Game client codebase including:
- CharacterActionControl: Character and creature management
- GlobalScript: Network, items, skills, quests, utilities
- RYLClient: Main client application with GUI and event handlers
- Engine: 3D rendering engine (RYLGL)
- MemoryManager: Custom memory allocation
- Library: Third-party dependencies (DirectX, boost, etc.)
- Tools: Development utilities

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Library/dxx8/include/mediaerr.h

@@ -0,0 +1,20 @@
+//------------------------------------------------------------------------------
+// File: MediaErr.h
+//
+// Desc: Shell error codes
+//
+// Copyright (c) 1999 - 2000, Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------------------------
+
+
+#ifndef _MEDIAERR_H_
+#define _MEDIAERR_H_
+
+#define DMO_E_INVALIDSTREAMINDEX 0x80040201
+#define DMO_E_INVALIDTYPE        0x80040202
+#define DMO_E_TYPE_NOT_SET       0x80040203
+#define DMO_E_NOTACCEPTING       0x80040204
+#define DMO_E_TYPE_NOT_ACCEPTED  0x80040205
+#define DMO_E_NO_MORE_ITEMS      0x80040206
+
+#endif _MEDIAERR_H_