Public/Clear-WFListBox.ps1

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function Clear-WFListBox
{
<#
    .SYNOPSIS
        This function will clear the content of a listbox control
     
    .DESCRIPTION
        This function will clear the content of a listbox control
     
    .PARAMETER ListBox
        Specifies the ListBox control to clear
     
    .EXAMPLE
        Clear-WFListBox -ListBox $ListBox
     
    .NOTES
        Francois-Xavier Cat
        @lazywinadm
        www.lazywinadmin.com
        github.com/lazywinadmin
#>

    
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateNotNull()]
        [System.Windows.Forms.ListBox]$ListBox
    )
    
    BEGIN
    {
        Add-Type -AssemblyName System.Windows.Forms
    }
    PROCESS
    {
        $ListBox.Items.Clear()
    }
}