Merge pull request #25 from CatalystCode/doc_readme_key

Update README.md

Author: Steven Edouard

README.md

@@ -19,7 +19,8 @@ To create a file association you can call the `fileAssociation.associateExeForFi
 an arbitrary file extension:
 
 ```js
-fileAssociation.associateExeForFile('myTestHandler', 'A test handler for unit tests', 'C:\\path\\to\\icon', 'C:\\Program Files\\nodejs\\node.exe %1', '.zzz');
+var utils = require('windows-registry');
+utils.associateExeForFile('myTestHandler', 'A test handler for unit tests', 'C:\\path\\to\\icon', 'C:\\Program Files\\nodejs\\node.exe %1', '.zzz');
 ```
 ## Reading / Writing to the Windows Registry
 
@@ -31,13 +32,15 @@ operations for keys to the registry.
 Registry keys can be opened by either opening a predefined registry key defined in the [windef](lib/windef.js) module:
 
 ```js
-var key = registry.openKeyFromPredefined(windef.HKEY.HKEY_CLASSES_ROOT, '.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
+var Key = require('windows-registry').Key;
+var key = new Key(windef.HKEY.HKEY_CLASSES_ROOT, '.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
 ```
 
 Or you can open a sub key from an already opened key:
 
 ```js
-var key = registry.openKeyFromPredefined(windef.HKEY.HKEY_CLASSES_ROOT, '.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
+var key = new Key(windef.HKEY.HKEY_CLASSES_ROOT, '', windef.KEY_ACCESS.KEY_ALL_ACCESS);
+var key2 = key.openSubKey('.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
 ```
 
 And don't forget to close your key when you're done, otherwise, you'll leak native resources:
@@ -48,29 +51,41 @@ key.close();
 
 ### Creating a Key
 
-Creating a key just requires that you have a [Key](lib/key.js) object from either `registry.openKeyFromPredefined` or
-`registry.openKeyFromKeyObject`.
+Creating a key just requires that you have a [Key](lib/key.js) object by either using the [predefined keys](https://github.com/CatalystCode/windows-registry-node/blob/master/lib/windef.js#L27) within the `windef.HKEY` or opening a subkey from an existing key.
 
 ```js
+// predefined key
 var key = registry.openKeyFromPredefined(windef.HKEY.HKEY_CLASSES_ROOT, '.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
-registry.createKey(key, '\test_key_name', windef.KEY_ACCESS.KEY_ALL_ACCESS);
+var createdKey = key.createSubKey('\test_key_name', windef.KEY_ACCESS.KEY_ALL_ACCESS);
 ```
 
 ### Delete a Key
 
-Similarly to creating a key you need a [Key](lib/key.js) object and you must specify the subkey name.
+To delete a key just call the `Key.deleteKey()` function.
 
 ```js
-registry.deleteKey(key, '\test_key_name');
+createdKey.deleteKey();
 ```
 
 ### Write a Value to a Key
 
 To write a value, you'll again need a [Key](lib/key.js) object and just need to call the `registry.setValueForKeyObject` function:
 
 ```js
-registry.setValueForKeyObject(key, 'test_value_name', windef.REG_VALUE_TYPE.REG_SZ, 'test_value');
+var key = new Key(windef.HKEY.HKEY_CLASSES_ROOT, '.txt', windef.KEY_ACCESS.KEY_ALL_ACCESS);
+key.setValue('test_value_name', windef.REG_VALUE_TYPE.REG_SZ, 'test_value');
 ``` 
+
+### Get a Value From a Key
+
+To get a value from a key, just call `Key.getValue`:
+
+```js
+var value = key.getValue('test_value_name');
+```
+
+The return value depends on the type of the key (REG_SZ for example will give you a string).
+
 ## Launching a Process as An Admin
 
 To launch a process as an Administrator, you can call the `uac.elevate` api, which will launch a process as an Administrator causing the UAC (User Account Control) elevation prompt to appear if required. This is similar to the Windows Explorer command "Run as administrator".  Pass in `FILEPATH` to the process you want to elevate. Pass in any`PARAMETERS` to run with the process. Since this is an asychronous call, pass in a callback to handle user's selection.
@@ -81,4 +96,4 @@ uac.elevate('C:\\Program Files\\nodejs\\node.exe', 'index.js', function (err, re
 
 ## More Docs?
 
-Make your way over to the [tests section](test) to see how the module is used.
+Make your way over to the [tests section](test) to see how the module can be used.