# Set

> [HTML Version](set_mx138.htm)

**xcall MIAMEX, MX\_REGISTRY, REGOP\_SET, hkey, name, type, value, status**

This is used to write a new or updated value to the Registry.

**Parameters**

_hkey  _(B,4)  \[in\]

must be set to the _hkeynew _value returned from a previous call to Create or Open a key.

_name  _([String](string.htm.md))  \[in\]

is the name of the value to write. (These are the items that appear in the left side of the right hand pane of regedit.exe.)

_type  _([Num](num.htm.md))  \[in\]

specifies the type of value you want to write:

| **Symbol** | **Value** | **Description** |
|------|------|------|
| REG\_NONE | 0 | No type |
| REG\_SZ | 1 | Null terminated string |
| REG\_EXPAND\_SZ | 2 | Same as (1) but signals that string may contain embedded environment variables (e.g. %temp%\\xyx.log) |
| REG\_BINARY | 3 | Raw binary data (use X format) |
| REG\_DWORD | 4 | 4 byte integer (use B,4 format) |
| REG\_MULTI'SZ | 7 | List of null terminated strings, with a double null terminating the list. See [Replace Null Delimiters](replacenulldelimiters.htm.md) for an alternative to using null delimiters (with are hard to work with in BASIC). |
| **Definition file: [ashell.def](ashell_def.htm.md)** | | 



_value_  ([String](string.htm.md) or B,4 depending on _type_)  \[in\]

The data to write to the named item.

_status_  (F6)  \[out\]

0 for success, else error code.