Sample Cmdlet to set PowerShell ISE status bar text

Set-ISEStatusText.ps1

function Main
{
    $sw = [Diagnostics.Stopwatch]::StartNew()

    1..10 | % {
        Set-ISEStatusText ("Step.{0}: Executing operation..." -f $_)
        sleep 1
    }

    Set-ISEStatusText ("Elapsed: {0}[ms]" -f $sw.ElapsedMilliseconds) -Force
}


function Set-ISEStatusText
{
    param (
        [Parameter(Mandatory)]
        [string] $Message,
        [switch] $Force
    )
    if ($host.Name -ne "Windows PowerShell ISE Host"){
        return
    }

    #Set ISE StatusTest by reflection
    [Microsoft.PowerShell.Host.ISE.PowerShellTab].GetProperty("StatusText").SetValue($psise.CurrentPowerShellTab, $Message)

    if ($Force)
    {
        #GetNewClosure don't work in Register-EngineEvent context. Need to evaluate before use by [ScriptBlock]::Create
        #https://connect.microsoft.com/PowerShell/feedback/details/541754/getnewclosure-doesnt-work-on-register-objectevent
        $action = [ScriptBlock]::Create('[Microsoft.PowerShell.Host.ISE.PowerShellTab].GetProperty("StatusText").SetValue($psise.CurrentPowerShellTab, "{0}")' -f $Message)
        
        #Register OnIdele event 
        $null = Register-EngineEvent -SourceIdentifier ([Management.Automation.PsEngineEvent]::OnIdle) -MaxTriggerCount 1 -Action $action
    }
}

. Main