function Get-ComputerDomainMembership {

    # https://learn.microsoft.com/en-us/windows/win32/api/dsrole/ne-dsrole-dsrole_machine_role
    # https://learn.microsoft.com/en-us/windows/win32/cimwin32prov/win32-computersystem

    enum MACHINE_ROLE {
        StandaloneWorkstation   = 0
        MemberWorkstation       = 1
        StandaloneServer        = 2
        MemberServer            = 3
        BackupDomainController  = 4
        PrimaryDomainController = 5
        } 

    $Win32CS = Get-CimInstance -ClassName Win32_ComputerSystem -Property Domain, DomainRole

    $obj = [PSCustomObject][ordered]@{
        Domain             = $Win32CS.Domain
        DomainRole         = [MACHINE_ROLE]$Win32CS.DomainRole
        IsDomainMember     = $false
        IsWorkstation      = $false
        IsServer           = $true
        IsDomainController = $false

        }

    if ($obj.DomainRole -in 1,3,4,5) {
        $obj.IsDomainMember = $true
        }

    if ($obj.DomainRole -in 4,5) {
        $obj.IsDomainController = $true
        }

    if ($obj.DomainRole -in 0,1) {
        $obj.IsWorkstation = $true
        $obj.IsServer      = $false
        }

    $obj

}