How Regedit Shows REG_NONE and Raw Binary Data

The Windows Registry Editor (Regedit) uses specific visual cues, column labels, and editing interfaces to denote values containing the REG_NONE type or unparsed binary data. This article explains how Regedit identifies these raw, unformatted data types via the Type column, visual icons, the Data column preview, and the built-in binary editor.

The “Type” Column Label

In Regedit’s right-hand pane, the “Type” column explicitly lists the designated data type of each registry entry. When a value is assigned the type ID 0 (which signifies no defined value type), Regedit explicitly displays REG_NONE in this column. If a registry key contains an unrecognized, custom, or unsupported data type ID that Regedit cannot interpret natively, it will display the entry as REG_NONE, REG_UNKNOWN, or show the raw numeric data type ID.

The Binary Icon

Regedit assigns distinctive icons next to value names to allow quick identification of data formats: * String Values (REG_SZ, REG_MULTI_SZ, REG_EXPAND_SZ): Indicated by a red page icon with the letters “ab”. * REG_NONE and Binary Values: Indicated by a binary data icon, which appears as a page containing binary digits (“011” or “110” in small blue blocks). Any unparsed or raw binary data type defaults to this binary icon.

The “Data” Column Representation

In the details view, Regedit formats REG_NONE and unparsed binary payloads as raw hexadecimal bytes: * If the value contains data, the “Data” column shows space-separated, two-character hexadecimal bytes (e.g., 00 4a 2f 1c). * If the value exists but contains no payload (zero bytes), the “Data” column explicitly displays the placeholder string (zero-length binary value).

The Binary Edit Dialog

Double-clicking a REG_NONE or unparsed value prompts Regedit to open the “Edit Binary Value” dialog box instead of a standard text or DWORD input box. This interface presents the data in a three-column hexadecimal editor format: 1. Offset: Displays the byte position index in hexadecimal (e.g., 0000, 0008). 2. Hexadecimal Pane: Displays the raw byte sequence in two-digit hex pairs. 3. ANSI/ASCII Pane: Displays the corresponding character representation of the bytes on the right, substituting unprintable characters with dots (.).