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>

Tools/Checksum/Checksum.h

@@ -0,0 +1,49 @@
+// Checksum.h : main header file for the CHECKSUM application
+//
+
+#if !defined(AFX_CHECKSUM_H__ACF27BD0_2726_41CC_BE58_FE87096C2E2D__INCLUDED_)
+#define AFX_CHECKSUM_H__ACF27BD0_2726_41CC_BE58_FE87096C2E2D__INCLUDED_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif // _MSC_VER > 1000
+
+#ifndef __AFXWIN_H__
+	#error include 'stdafx.h' before including this file for PCH
+#endif
+
+#include "resource.h"		// main symbols
+
+/////////////////////////////////////////////////////////////////////////////
+// CChecksumApp:
+// See Checksum.cpp for the implementation of this class
+//
+
+class CChecksumApp : public CWinApp
+{
+public:
+	CChecksumApp();
+
+// Overrides
+	// ClassWizard generated virtual function overrides
+	//{{AFX_VIRTUAL(CChecksumApp)
+	public:
+	virtual BOOL InitInstance();
+	//}}AFX_VIRTUAL
+
+// Implementation
+
+	//{{AFX_MSG(CChecksumApp)
+		// NOTE - the ClassWizard will add and remove member functions here.
+		//    DO NOT EDIT what you see in these blocks of generated code !
+	//}}AFX_MSG
+	DECLARE_MESSAGE_MAP()
+};
+
+
+/////////////////////////////////////////////////////////////////////////////
+
+//{{AFX_INSERT_LOCATION}}
+// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
+
+#endif // !defined(AFX_CHECKSUM_H__ACF27BD0_2726_41CC_BE58_FE87096C2E2D__INCLUDED_)