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<#
.Synopsis
   Verifies if computername matches Windows machine naming requirements
.DESCRIPTION
   This function accepts a computername string and regex verifies if that name meets Windows machine naming requirements
.PARAMETER ComputerName
    String of computername to be tested
.EXAMPLE
   Test-ComputerName -ComputerName PC-Num-43123
    This will verify if the computer name meets windows requirements
.EXAMPLE
   Test-ComputerName PC-Num-43123
   This will verify if the computer name meets windows requirements - the -ComputerName does not have to be explicitly used
.OUTPUTS
   Boolean value
.NOTES
   Author: Jake Morrison
   http://techthoughts.info
#>
function Test-ComputerName {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true,
            ValueFromPipeline = $true,
            Position = 0
        )]
        [String]
        $ComputerName
    )
    #assume the best
    [bool]$compEval = $true
    if ($computerName -notmatch '(?i)(?=.{5,15}$)^(([a-z\d]|[a-z\d][a-z\d\-]*[a-z\d])\.)*([a-z\d]|[a-z\d][a-z\d\-]*[a-z\d])$') {
        $compEval = $false
    }
    return $compEval
}