Define variable in caller scope

define-variable-in-caller-scope.ps1

# Sets variable $a = 1000 in the local scope from which it was called from, like $matches in regex
Get-Module m | Remove-Module
New-Module m {
    function f {
        [CmdletBinding()]
        param()

        $sb = [ScriptBlock]::Create('param($Value);  $a = $Value')
        $ExecutionContext.InvokeCommand.InvokeScript($PSCmdlet.SessionState, $sb, @(1000))
    }
} | Import-MOdule

Get-Variable a -ErrorAction Ignore |  Remove-Variable

f
"a: $a"