using powershell to change registry binary data

Question

I understand that with powershell it's possible to change registry values.

for example, here: http://poshcode.org/3504

we can set the properties like this:

Set-ItemProperty 'HKCU:\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\ftp\UserChoice' -name ProgId IE.FTP

however, is it possible to set these binary values using powershell??

enter image description here

Andy Arismendi · Accepted Answer · 2013-04-09 23:41:15Z

13

Read the value (a byte array)
Modify the array element
Write the byte array back to the registry key.

Here's an example:

$key = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections'

$data = (Get-ItemProperty -Path $key -Name DefaultConnectionSettings).DefaultConnectionSettings
$data[8] = 9
Set-ItemProperty -Path $key -Name DefaultConnectionSettings -Value $data

answered Apr 9, 2013 at 23:41

Andy Arismendi

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3 Comments

Alex Gordon Over a year ago

this looks amazing!! when you are doing this $data[8] = 9. does this convert 9 to hex?

Andy Arismendi Over a year ago

the byte array is an array of decimal values 0-255. see system.byte. The data is only displayed in base 16 (hex) with the registry editor.

Alex Gordon Over a year ago

absolutely amazing answer! how did u know how to do this?

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