PowerShell Winforms MoveUp/MoveDown - winforms

Question

Have only recently started getting into PowerShell forms and it's proving to be a minefield on support once I hit a wall. There's so much out there for c# but more often than not I struggle to convert it to PowerShell.
The code below is a snippet of a much larger script for Skype stuff (excuse the poor late out, no point adding irreverent code). What I'm struggling to do is create Move Up/Move Down buttons for when my CheckedListBox is populated.
The CheckedListBox is important since everyone within the list will be added to a Skype response group, and everyone checked will be designated an admin of the group. The Move Up/Move Down buttons will be used for priority purposes when this type of routing is selected.
#Function for creating an "open file" button
Function OpenFileDialog
{ [System.Reflection.Assembly]::LoadWithPartialName( "System.Windows.Forms" ) | Out-Null
$OBJFORM = New-Object System.Windows.Forms.OpenFileDialog
$OBJFORM.Filter = "Text files (*.txt)|*.txt"
$TXTIMPORT = $OBJFORM.ShowDialog()
IF ( $TXTIMPORT -eq "OK" )
{ Return $OBJFORM.FileName } }
# ///////////////
#Function for importing users
Function ImportUsers
{ $USERS = gc $TAB2IMPORT
$SIPUSERS = #()
foreach ( $USER in $USERS )
{ $USERSIP = ( "sip:" + $_ )
$SIPUSERS += $USERSIP
IF ( $USERSIP -ne $NULL )
{ [void]$TAB2LISTBOX.Items.Add( $USERSIP ) }
IF ( $SIPUSERS.Count -ge 2 )
{ $TAB2LISTL.Visible = $TRUE } } }
# ///////////////
# Adds .NET assemby's and turns on visual themes in standard PowerShell.
Add-Type -AssemblyName System.Drawing
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.Application]::EnableVisualStyles()
# ///////////////
# Creates the parent form and controls
$SDC = New-Object System.Windows.Forms.Form
$SDC.Location = '270,175'
$SDC.Size = '900,600'
$SDC.StartPosition = "CenterScreen"
$SDC.BackColor = "Lavender"
$SDC.Font = "Calibri, 8.5"
$SDC.FormBorderStyle = "Fixed3D"
$TABC = New-Object System.Windows.Forms.TabControl
$TABC.Location = '140,20'
$TABC.Size = '720,520'
$TABC.SizeMode = "Fixed"
$SDC.Controls.Add( $TABC )
# ///////////////
#Tab controls
$TAB2 = New-Object System.Windows.Forms.TabPage
$TAB2.Location = '20,40'
$TAB2.Size = '100,100'
$TAB2.Text = "Response Group"
$TAB2.Padding = New-Object System.Windows.Forms.Padding ( 3,3,3,3 )
$TAB2.AutoScroll = $TRUE
$TABC.Controls.Add( $TAB2 )
# ///////////////
#Tab 2 ( Migrate users to Skype )
$TAB2HEADER = New-Object System.Windows.Forms.Label
$TAB2HEADER.Font = New-Object System.Drawing.Font( "Calibri",11,[System.Drawing.FontStyle]::Bold )
$TAB2HEADER.Location = '50,30'
$TAB2HEADER.Size = '620,30'
$TAB2HEADER.Text = "This tab will create a response group."
$TAB2.Controls.Add( $TAB2HEADER )
# ///////////////
#Tab 2 Add Users to Hunt Group
$TABAGENTSL = New-Object System.Windows.Forms.Label
$TABAGENTSL.Font = New-Object System.Drawing.Font( "Calibri",8,[System.Drawing.FontStyle]::Bold )
$TABAGENTSL.Location = '50,420'
$TABAGENTSL.Size = '200,20'
$TABAGENTSL.Text = "Who do you want adding to the group?"
$TAB2.Controls.Add( $TABAGENTSL )
#Tab 2 Open File Button
$TAB2IMPORT = New-Object System.Windows.Forms.Button
$TAB2IMPORT.Location = '50,450'
$TAB2IMPORT.Size = '80,20'
$TAB2IMPORT.Text = "File Import"
$TAB2.Controls.Add( $TAB2IMPORT )
$TAB2IMPORT.Add_Click( { $TAB2IMPORT = OpenFileDialog ; ImportUsers } )
# ///////////////
#Tab 2 ListBox for Users
$TAB2LISTBOX = New-Object System.Windows.Forms.CheckedListBox
$TAB2LISTBOX.Location = '320,120'
$TAB2LISTBOX.Size = '200,200'
$TAB2.Controls.Add( $TAB2LISTBOX )
#Tab 2 Listbox Help
$TAB2LISTL = New-Object System.Windows.Forms.Label
$TAB2LISTL.Font = New-Object System.Drawing.Font( "Calibri",8,[System.Drawing.FontStyle]::Italic )
$TAB2LISTL.Location = '550,120'
$TAB2LISTL.Size = '150,80'
$TAB2LISTL.Text = "All names within the list will be added to the response group. `nThose checked will be designated response group admins"
$TAB2LISTL.Visible = $FALSE
$TAB2.Controls.Add( $TAB2LISTL )
$TAB2LISTMU = New-Object System.Windows.Forms.Button
$TAB2LISTMU.Location = '530,260'
$TAB2LISTMU.Text = "&Move Up"
$TAB2.Controls.Add( $TAB2LISTMU )
$SDC.Add_Shown( { $SDC.Activate() } )
$SDC.ShowDialog()
I bought PowerShell Pro Tools for Visual Studio but hit the same stumbling blocks in that if I don't know what tool it is I need to begin with, I can't figure out from the options available on screen. As a result I've resided myself to ISE until I die!
Any help would be greatly appreciated. Thanks

Answer 1

I found a link on how to do it.
https://www.akaplan.com/blog/2016/05/move-selected-item-up-or-down-in-powershell-listbox/
*edit
I 'cleaned' up the code for my own use as shown below:
#Function for Move Down
Function MoveDown {
IF ( ( $TAB2LISTBOX.SelectedIndex -ne -1 ) -and ( $TAB2LISTBOX.SelectedIndex -lt $TAB2LISTBOX.Items.Count - 1 ) )
{ $TAB2LISTBOX.BeginUpdate()
$SELECTITEM = $TAB2LISTBOX.SelectedIndex
$TAB2LISTBOX.Items.Insert( $SELECTITEM, $TAB2LISTBOX.Items.Item( $SELECTITEM +1 ) )
$TAB2LISTBOX.Items.RemoveAt( $SELECTITEM +2 )
$TAB2LISTBOX.SelectedIndex = ( $SELECTITEM +1 )
$TAB2LISTBOX.EndUpdate() } }
#Function for Move Up
Function MoveUp {
IF ( $TAB2LISTBOX.SelectedIndex -gt 0 )
{ $TAB2LISTBOX.BeginUpdate()
$SELECTITEM = $TAB2LISTBOX.selectedIndex
$TAB2LISTBOX.Items.Insert( $SELECTITEM -1, $TAB2LISTBOX.Items.Item( $SELECTITEM ) )
$TAB2LISTBOX.SelectedIndex = ( $SELECTITEM -1 )
$TAB2LISTBOX.Items.RemoveAt( $SELECTITEM +1 )
$TAB2LISTBOX.EndUpdate() } }