XNA, Managed DirectX and Game Programming

PowerShell - Find and Replace Registry Functions

I was doing some research on some PowerShell scripts for work and came across some simple functions for Find and Replace for the Registry. These functions were put together by Jason Stangroome from Code Assassin.

"I wanted a fast way to find all "U:\Program Files" references in the registry and repoint them to drive C:. The standard Windows regedit.exe only supports Find but not Replace (and there were a lot of keys to fix) and third party registry tools available on the Internet fall into the untrustworthy category for fixing servers."

[code language="C#"]

function Find-RegistryValue (
    [string] $seek = $(throw "seek required."),
    [System.Management.Automation.PathInfo] $regpath = (Get-Location) ) {

    if ($regpath.Provider.Name -ne "Registry") { throw "regpath required." }

    $keys = @(Get-Item $regpath -ErrorAction SilentlyContinue) `
        + @(Get-ChildItem -recurse $regpath -ErrorAction SilentlyContinue);

    $results = @();

    foreach ($key in $keys) {
        foreach ($vname in $key.GetValueNames()) {
            $val = $key.GetValue($vname);
            if ($val -match $seek) {
                $r = @{};
                $r.Key = $key;
                $r.ValueName = $vname;
                $r.Value = $val;
                $results += $r;
            }
        }
    }

    $results;
}

[/code]

[code language="C#"]

 function Replace-RegistryValue (
    [string] $seek = $(throw "seek required."),
    [string] $swap = $(throw "swap required."),
    [System.Management.Automation.PathInfo] $regpath = (Get-Location) ) {

    $find = Find-RegistryValue -seek $seek -regpath $regpath;
    $results = @();

    foreach ($target in $find) {
        $nval = $target.Value -replace $seek, $swap;
        $r = @{};
        $r.Key = $target.Key;
        $r.ValueName = $target.ValueName;
        $r.OldValue = $target.Value;
        $r.NewValue = $nval;
        $results += $r;
        $wKey = (Get-Item $r.Key.PSParentPath).OpenSubKey($r.Key.PSChildName, "True");
        $wKey.SetValue($target.ValueName, $nval);
    }

    $results;
}

[/code]