Functions/Test-EventLogSource.ps1

Function Test-EventLogSource
{
    Param(
        [Parameter(Mandatory=$True)]
        [string]$LogName
    )
    IF($True -eq (Test-IsAdministrator)){
        [System.Diagnostics.EventLog]::SourceExists($LogName)
    }
    ELSE{
        Write-Error "You need elevated privileges to run this command"
    }
}