node-winreg
===========

node module that provides access to the Windows Registry through the REG commandline tool


Installation
------------

```shell
npm install winreg 
```


Usage
-----

Let's start with an example. The code below lists the autostart programs of the current user.

```javascript

var Winreg = require('winreg')
,   regKey = new Winreg({
      hive: Winreg.HKCU,                                          // HKEY_CURRENT_USER
      key:  '\\Software\\Microsoft\\Windows\\CurrentVersion\\Run' // key containing autostart programs
    })

// list autostart programs
regKey.values(function (err, items) {
  if (err)
    console.log('ERROR: '+err);
  else
    for (var i in items)
      console.log('ITEM: '+items[i].name+'\t'+items[i].type+'\t'+items[i].value);
});

```


The following options are processed by the Winreg constructor:

  * __host__  the optional hostname, must start with the '\\\\' sequence
  * __hive__  the optional hive id (see below), the default is __HKLM__
  * __key__   the optional key, the default is th root key

The key, if specified, has to start, but must not be terminated with a '\\' character.


The instances of Winreg provide access to a single registry key. The hive id can be one of the following:

  * __HKLM__  HKEY_LOCAL_MACHINE
  * __HKCU__  HKEY_CURRENT_USER
  * __HKCR__  HKEY_CLASSES_ROOT
  * __HKCC__  HKEY_CURRENT_CONFIG
  * __HKU__   HKEY_USERS


Registry values are returned as objects, containing the following information:

  * __host__  the hostname, if it has been set in the options
  * __hive__  the hive id, as specified in the options
  * __key__   the key, as specified in the options
  * __name__  the name of the registry value
  * __type__  one of the types listed below
  * __value__ a string containing the value


Registry values can have one of the following types:

  * __REG_SZ__        a string value
  * __REG_MULTI_SZ__  a multiline string value
  * __REG_EXPAND_SZ__ an expandable string value
  * __REG_DWORD__     a double word value (32 bit integer)
  * __REG_QWORD__     a quad word value (64 bit integer)
  * __REG_BINARY__    a binary value
  * __REG_NONE__      a value of unknown type


Following methods are provided by instances of Winreg:

<table>
  <tr>
    <th>Method</th>
    <th>Parameters</th>
    <th>Description</th>
  </tr>
  <tr>
    <td>values</td>
    <td>callback</td>
    <td>list the values under this key</td>
  </tr>
  <tr>
    <td>keys</td>
    <td>callback</td>
    <td>list the subkeys of this key</td>
  </tr>
  <tr>
    <td>get</td>
    <td>name, callback</td>
    <td>gets a value by it's name</td>
  </tr>
  <tr>
    <td>set</td>
    <td>name, type, value, callback</td>
    <td>sets a value</td>
  </tr>
  <tr>
    <td>remove</td>
    <td>name, callback</td>
    <td>remove the value with the given key</td>
  </tr>
  <tr>
    <td>create</td>
    <td>callback</td>
    <td>create this key</td>
  </tr>
  <tr>
    <td>erase</td>
    <td>callback</td>
    <td>remove this key</td>
  </tr>
</table>


Following readonly properties are provided by instances of Winreg:

<table>
  <tr>
    <th>Property</th>
    <th>Type</th>
    <th>Description</th>
  </tr>
  <tr>
    <td>host</td>
    <td>string</td>
    <td>the hostname, if specified in the options</td>
  </tr>
  <tr>
    <td>hive</td>
    <td>string</td>
    <td>the registry hive</td>
  </tr>
  <tr>
    <td>key</td>
    <td>string</td>
    <td>the registry key</td>
  </tr>
  <tr>
    <td>path</td>
    <td>string</td>
    <td>this key's path</td>
  </tr>
  <tr>
    <td>parent</td>
    <td>Winreg</td>
    <td>a new Winreg instance initialized with the parent key</td>
  </tr>
</table>