How-To edit part of a registry value

Question

I`m looking for å way to remove last the 3 letters from a registry value.

Example:

[HKEY_CURRENT_USER\Software\Test]

"Setting"="ABCDDD"

I would like it to end up like this:

[HKEY_CURRENT_USER\Software\Test]

"Setting"="ABC"

It is always 6 letters, and I want always to remove the last 3. I prefer to achieve this using GPO.

Thanks!

Regards Fredrik

Answer 1

As it's pretty short, this might start you off:

$registryPath = "HKCU:\Software\Test\" #reg key
$Name         = "setting"              #reg value
$value        = "ABCDDD"               #default value if does not exist

IF(!(Test-Path $registryPath))
{
    #Key does not exist, create key and set default
    New-Item -Path $registryPath -Force | Out-Null
    New-ItemProperty -Path $registryPath -Name $name -Value $value -PropertyType String -Force | Out-Null
}
ELSE 
{
    #Key exists, read existing value and trim
    $strValue = (Get-ItemProperty -Path $registryPath).($Name)
    $strNew   = $strValue.SubString(0,3)
    New-ItemProperty -Path $registryPath -Name $name -Value $strNew -PropertyType String -Force | Out-Null
}