diff --git a/src/WinAPI/NativeMethods/ErrorCodes.cs b/src/WinAPI/NativeMethods/ErrorCodes.cs
new file mode 100644
index 0000000..1b8f0e2
--- /dev/null
+++ b/src/WinAPI/NativeMethods/ErrorCodes.cs
@@ -0,0 +1,49 @@
+namespace Larin.WinAPI.NativeMethods;
+
+/// <summary>
+/// Windows System Error codes
+/// </summary>
+/// <remarks>https://learn.microsoft.com/en-us/windows/win32/debug/system-error-codes</remarks>
+public static class ErrorCodes
+{
+	/// <summary>
+	/// The operation completed successfully.
+	/// </summary>
+	public const int ERROR_SUCCESS = 0;
+
+	/// <summary>
+	/// Incorrect function.
+	/// </summary>
+	public const int ERROR_INVALID_FUNCTION = 1;
+
+	/// <summary>
+	/// The system cannot find the file specified.
+	/// </summary>
+	public const int ERROR_FILE_NOT_FOUND = 2;
+
+	/// <summary>
+	/// The system cannot find the path specified.
+	/// </summary>
+	public const int ERROR_PATH_NOT_FOUND = 3;
+
+	/// <summary>
+	/// The system cannot open the file.
+	/// </summary>
+	public const int ERROR_TOO_MANY_OPEN_FILES = 4;
+
+	/// <summary>
+	/// Access is denied.
+	/// </summary>
+	public const int ERROR_ACCESS_DENIED = 5;
+
+	/// <summary>
+	/// The handle is invalid.
+	/// </summary>
+	public const int ERROR_INVALID_HANDLE = 6;
+
+	/// <summary>
+	/// No more data is available.
+	/// </summary>
+	public const int ERROR_NO_MORE_ITEMS = 259;
+}
+