eading from and Writing to the Windows Registry in Visual Basic .Net

First, we will look into a parent key and see the names of all of the sub-keys. Our parent key in this example is named Acme, and is located in the hKey.LocalMachine.Software registry hive.

Dim s() As String = Registry.LocalMachine.OpenSubKey("SOFTWARE\Acme").GetValueNames

For x As Integer = 0 To s.Length - 1
TextBox1.Text &= s(x) & vbCrLf
Next

Once you know the name of the subkey that you want to read, you can read the data from it. In this example we want to read from the Acme subkey a value named UserName:

Dim myParentKey As Microsoft.Win32.RegistryKey = Microsoft.Win32.Registry.LocalMachine
Dim mySubKey As Microsoft.Win32.RegistryKey = myParentKey.OpenSubKey("SOFTWARE\Acme", True)
If mySubKey Is Nothing Then
mySubKey = myParentKey.CreateSubKey("SOFTWARE\Acme")
End If
TextBox1.Text = CStr(objSubKey.GetValue("UserName", ""))

It is just as easy to write a value into the registry. For this example we will set the UserName to hold the value "Joe":

Dim mySubKey As Microsoft.Win32.RegistryKey
Dim myParentKey As Microsoft.Win32.RegistryKey
myParentKey = Microsoft.Win32.Registry.LocalMachine
mySubKey = myParentKey.OpenSubKey("SOFTWARE\Acme", True)
'create if doesn't exist
If mySubKey Is Nothing Then
mySubKey = myParentKey.CreateSubKey(SubKeyName)
End If
mySubKey.SetValue("UserName", "Joe")

Study and Research resources:

Microsoft Certification Info:

See the list of .Net articles

TOGGIT IN SEARCH OF CERTIFICATION

All information on this site is copyright ToggIT.com unless otherwise specified. Material submitted or posted this site may also contain materials that are copyrights of individual contributors. It is illegal to copy, publish, reproduce, or distribute any materials from this site with the express permission of the owner of this material.

The material on this web site is not sponsored by, endorsed by or affiliated with Microsoft, Inc, CompTIA, or Cisco Systems, Inc. Microsoft, Inc.® ,Windows XP, Windows 2000, Windows 2000 Server, Windows 98, Windows NT, Visual Basic, Visual C++, Visual FoxPro, SQL server and Microsoft logos are trademarks or registered trademarks of Microsoft, Inc. in the United States and certain other countries. A+, Server+, and Network+ are all registered trademarks of CompTIA. CCNA, CCNE, and the Cisco logo are all registered trademarks of Cisco Systems. All other trademarks are trademarks of their respective owners.