[Reference] RegEdit

Hej has been asking me a series of questions regarding Dwords and related, Instead of just sending over the code (which was my initial intention)I have decided to create a "Article" / "Tut" as this can be usueful to developers for 100's of reasons.

Registry Keys Article/Tutorial


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As always, Follow this article, read along, and open VB and start a new project and follow along.

Developers (Windows Developers) have been using the registry as a place to store application settings, and in some cases can be used to change settings of other applications, so the question becomes, how can we harnest this feature in VB.net

Definitions paraphrased by me (Original Source Wiki)

SubTree

• HKEY_CURRENT_USER
  Configuration Settings of the user who logged on. (Currently)
• HKEY_USERS
  Contains all user profiles Settings.
• HKEY_LOCAL_MACHINE
  Contains Settings and configuration Information particular to the computer.
• HKEY_CLASSES_ROOT
  Contains data that associates extensions wiith the program, and configuration data for COM objects.
• HKEY_CURRENT_CONFIG
  Contains information about hardware used on system startup.

Subkeys and Values.

Paraphrased by me (original source WIKI)

• REG_SZ
  A fixed-length text string.
• REG_EXPAND_SZ
  A variable-length text string.
• REG_DWORD
  A number that is 4 bytes (32 bits) long. (Data)
• REG_MULTI_SZ
  Multiple text strings formatted as an array of null strings

Microsoft.Win32 Namespace

• ClassesRoot
  Read base key HKEY_CLASSES_ROOT.
• CurrentConfig
  Reads base key HKEY_CURRENT_CONFIG.
• CurrentUser
  Reads base key HKEY_CURRENT_USER
• LocalMachine
  Reads base key HKEY_LOCAL_MACHINE.
• Users
  Reads base key HKEY_USERS.
• Name
  Retrieves the name of key.
• SubKeyCount
  Retrieves the count of subkeys.
• ValueCount
  Retrieves the count of values.
• Close
  Closes the key.
• CreateSubKey
  Creates a subkey or opens one.
• DeleteSubKey
  Deletes a subkey.
• DeleteSubKeyTree
  Deletes a subkey and any child subkeys.
• DeleteValue
  Deletes the specified value from this key.
• GetSubKeyNames
  Retrieves an array of strings from all subkey names.
• GetValue
  Retrieves the specified value.
• GetValueNames
  Retrieves an array of strings from all names associated with the specified Key
• OpenSubKey
  Retrieves a specified subkey (with write access)
• SetValue
  Sets the specified value.

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Example 1 (Create Subkey)

What did this do?

This code created a subkey under HKLM\Software called "mpgh sample app".

Example 2 (Reading and Writing a Subkey)

and Finally the easiest of them all , Deleting a key

In this example, The create "mpgh sample app" key is deleted

Hope this helps everyone who may need it, have fun and enjoy