HelperFunctions

2.2.20

Public/Test-IsInstalled.ps1

function global:Test-IsInstalled
{
        <#
            .EXTERNALHELP HelperFunctions.psm1-Help.xml
        #>
    
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true,
                 Position = 0)]
        [ValidateNotNullOrEmpty()]
        [String]$Program
    )
    
    begin { }
    process
    {
        $x86 = ((Get-ChildItem "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall") | `
            Where-Object { $_.GetValue("DisplayName") -like "*$program*" }).Length -gt 0;
        
        $x64 = ((Get-ChildItem "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall") | `
            Where-Object { $_.GetValue("DisplayName") -like "*$program*" }).Length -gt 0;
    }
    end
    {
        return $x86 -or $x64;
    }
} #End function Test-IsInstalled