Public/Remove-WFListBoxItem.ps1

function Remove-WFListBoxItem
{
<#
    .SYNOPSIS
        Function to remove item(s) from a ListBox Control
     
    .DESCRIPTION
        Function to remove item(s) from a ListBox Control
     
    .PARAMETER ListBox
        Specifies the ListBox control
     
    .PARAMETER All
        Specifies that you want to remove all the item
     
    .PARAMETER Pattern
        Specifies that you want to remove items with a specific pattern
     
    .PARAMETER SelectedItems
        Specifies that you want to remove the selected items
     
    .NOTES
        Author: Francois-Xavier Cat
        Twitter:@LazyWinAdm
        www.lazywinadmin.com
        github.com/lazywinadmin
#>

    
    [CmdletBinding(DefaultParameterSetName = 'All',
                   SupportsShouldProcess = $true)]
    param
    (
        [Parameter(ParameterSetName = 'All',
                   Mandatory = $true)]
        [Parameter(ParameterSetName = 'Pattern',
                   Mandatory = $true)]
        [Parameter(ParameterSetName = 'Selected',
                   Mandatory = $true)]
        [ValidateNotNull()]
        [System.Windows.Forms.ListBox]$ListBox,
        
        [Parameter(ParameterSetName = 'All',
                   Mandatory = $true)]
        [Switch]$All,
        
        [Parameter(ParameterSetName = 'Pattern',
                   Mandatory = $true)]
        [String[]]$Pattern,
        
        [Parameter(ParameterSetName = 'Selected',
                   Mandatory = $true)]
        [Switch]$SelectedItems
    )
    
    #Requires -Version 3
    
    BEGIN
    {
        Add-Type -AssemblyName System.Windows.Forms
        
        Write-Verbose -Message "BEGIN - ListBox - Begining to update"
        $ListBox.BeginUpdate()
    }
    PROCESS
    {
        IF ($PSBoundParameters['All'])
        {
            Write-Verbose -Message "PROCESS - ListBox - Clear all item(s)"
            IF ($PSCmdlet.ShouldProcess($ListBox,"Clear all item(s)"))
            {
                $ListBox.Items.Clear()
            }
        }
        
        IF ($PSBoundParameters['Pattern'])
        {
            Write-Verbose -Message "PROCESS - ListBox - Clear item(s) with specific pattern"
            foreach ($item in $ListBox.Items)
            {
                foreach ($Text in $Pattern)
                {
                    IF ($item -like $Text)
                    {
                        IF ($PSCmdlet.ShouldProcess($ListBox, "Remove Item with pattern $pattern : $item"))
                        {
                            Write-Verbose -Message "PROCESS - ListBox - Removing item: $item"
                            $ListBox.Items.Remove($item)
                        }
                    }
                }
            }
        }
        IF ($PSBoundParameters['SelectedItems'])
        {
            while ($ListBox.SelectedItems -gt 0)
            {
                foreach ($item in $ListBox.SelectedItems)
                {
                    IF ($PSCmdlet.ShouldProcess($ListBox, "Remove selected Item $item"))
                    {
                        Write-Verbose -Message "PROCESS - ListBox - Removing selected item: $item"
                        $ListBox.Items.Remove($item)
                    }
                }
            }
        }
        
    }
    END
    {
        Write-Verbose -Message "END - ListBox - End of update"
        $ListBox.EndUpdate()
    }
}