Ran into a case where I need to know if –Verbose had been passed in as a parameter to an advanced function today.  I initially thought I could simply do the following:

function Test
{

    [CmdletBinding()]
    param()
    if($Verbose)
    {
        $True
    }
    else
    {
        $False
    }
}

PS C:\Users\spowser> Test -Verbose
False

Hmmmm.  Ok.  Powershell doesn’t think –Verbose was used.  Has to be a way to get to the bound parameters.

Found this as the solution.

function Test
{

    [CmdletBinding()]
    param()
    if($PSBoundparameters["Verbose"].IsPresent)
    {
        $True
    }
    else
    {
        $False
    }
}

PS C:\Users\spowser> Test -Verbose
True

Much better :)

Hope this helps.

-Shane