AlticapMyModule.psm1

$global:var = "test"

function Write-Something
{
  <#
      .SYNOPSIS
      Short Description
      .DESCRIPTION
      Detailed Description
      .EXAMPLE
      Write-Something
      explains how to use the command
      can be multiple lines
      .EXAMPLE
      Write-Something
      another example
      can have as many examples as you like
  #>

  write-host $global:var
}