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function Get-RemoteRegistryProgram
{
<#
.Synopsis
Uses remote registry to read installed programs
.DESCRIPTION
Use dot net and the registry key class to query installed programs from a
remote machine
.EXAMPLE
Get-RemoteRegistryProgram -ComputerName Server1
#>
[CmdletBinding()]
Param
(
[Parameter(
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true,
Position=0)]
[string[]]
$ComputerName = $env:COMPUTERNAME
)
begin
{
$hives = @(
[Microsoft.Win32.RegistryHive]::LocalMachine,
[Microsoft.Win32.RegistryHive]::CurrentUser
)
$nodes = @(
"Software\Microsoft\Windows\CurrentVersion\Uninstall",
"Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
)
}
process
{
forEach ($computer in $ComputerName)
{
forEach($hive in $hives)
{
try
{
$registry = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey($hive,$computer)
}
catch
{
throw $PsItem
}
forEach($node in $nodes)
{
try
{
$keys = $registry.OpenSubKey($node).GetSubKeyNames()
forEach($key in $keys)
{
$displayname = $registry.OpenSubKey($node).OpenSubKey($key).GetValue('DisplayName')
if($displayname)
{
$installedProgram = @{
ComputerName = $computer
DisplayName = $displayname
Version = $registry.OpenSubKey($node).OpenSubKey($key).GetValue('DisplayVersion')
}
New-Object -TypeName PSObject -Property $installedProgram
}
}
}
catch
{
$orginalError = $PsItem
Switch($orginalError.FullyQualifiedErrorId)
{
'InvokeMethodOnNull' {
#key maynot exists
}
default {throw $orginalError }
}
}
}
}
}
}
end
{
}
}