Swap Mouse Buttons

<#
    .DESCRIPTION
        Swaps between right-handed mouse buttons and left-handed mouse buttons
#>
param ([ValidateSet('Left', 'Right')]$Handed)

function New-BalloonTip {
    <#
    .SYNOPSIS
    Displays a balloon tip in the lower right corner of the screen.
    .DESCRIPTION
    Displays a balloon tip in the lower right corner of the screen. Icon, title, and text can be customized.

    The icon displayed in the tray can be customized to be one of the standard icons, or, if the -AppIcon switch is used instead, can be the icon used by the application itself.
    .EXAMPLE
    New-BalloonTip -IconType info -Title 'Do not disturb' -Text "I'm busy"

    Description
    -----------
    Creates a balloon tip in the lower right corner.
    .INPUTS
    None. You cannot pipe objects to this script.
    .NOTES
    #Requires -Version 2.0
    .OUTPUTS
    None.
    #>

    [CmdletBinding(DefaultParameterSetName = 'p1')]
    Param (
        [Parameter(Mandatory, Position = 0)][string]$Title,
        [Parameter(Mandatory, Position = 1)][string]$Text,
        [Parameter(ParameterSetName = 'p1')][ValidateSet('Application', 'Asterisk', 'Error', 'Exclamation', 'Hand', 'Information', 'Question', 'Shield', 'Warning', 'WinLogo')][string]$TrayIcon = 'Information',
        [Parameter(ParameterSetName = 'p2')][switch]$AppIcon,
        [Parameter()][ValidateSet('None', 'Info', 'Warning', 'Error')][string]$IconType = 'Info'
    )

    [void][System.Reflection.Assembly]::LoadWithPartialName('System.Windows.Forms')

    $Balloon = New-Object System.Windows.Forms.NotifyIcon
    switch ($PSCmdlet.ParameterSetName) {
        'p1'  {
            $Balloon.Icon = switch ($TrayIcon) {
                'Application' { [System.Drawing.SystemIcons]::Application }
                'Asterisk'    { [System.Drawing.SystemIcons]::Asterisk }
                'Error'       { [System.Drawing.SystemIcons]::Error }
                'Exclamation' { [System.Drawing.SystemIcons]::Exclamation }
                'Hand'        { [System.Drawing.SystemIcons]::Hand }
                'Information' { [System.Drawing.SystemIcons]::Information }
                'Question'    { [System.Drawing.SystemIcons]::Question }
                'Shield'      { [System.Drawing.SystemIcons]::Shield }
                'Warning'     { [System.Drawing.SystemIcons]::Warning }
                'WinLogo'     { [System.Drawing.SystemIcons]::WinLogo }
            }
        }
        'p2'{
            $path = Get-Process -ID $PID | Select-Object -ExpandProperty Path
            $Balloon.Icon = [System.Drawing.Icon]::ExtractAssociatedIcon($path)
        }
    }
    $Balloon.BalloonTipIcon = $IconType
    $Balloon.BalloonTipText = $Text
    $Balloon.BalloonTipTitle = $Title
    $Balloon.Visible = $true
    $Balloon.ShowBalloonTip(10000)
} # New-BalloonTip

[Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null

$SwapButtons = Add-Type -MemberDefinition @'
[DllImport("user32.dll")]
public static extern bool SwapMouseButton(bool swap);
'@ -Name "NativeMethods" -Namespace "PInvoke" -PassThru

# Write-Host "Mouse buttons currently swapped?" ([System.Windows.Forms.SystemInformation]::MouseButtonsSwapped)
if ($PSBoundParameters.ContainsKey('Handed')) {
    if (($Handed -eq 'Left' -and (-not [System.Windows.Forms.SystemInformation]::MouseButtonsSwapped)) -or
        ($Handed -eq 'Right' -and [System.Windows.Forms.SystemInformation]::MouseButtonsSwapped)) {
        [bool]$returnValue = $SwapButtons::SwapMouseButton(!([System.Windows.Forms.SystemInformation]::MouseButtonsSwapped))
    }
} else {
    [bool]$returnValue = $SwapButtons::SwapMouseButton(!([System.Windows.Forms.SystemInformation]::MouseButtonsSwapped))
}

if ([Environment]::UserInteractive) {
    if ([System.Windows.Forms.SystemInformation]::MouseButtonsSwapped) {
        New-BalloonTip -Title 'Left Handed buttons' -Text 'Mouse buttons are now configured for left hand' -TrayIcon Information -IconType Info
    } else {
        New-BalloonTip -Title 'Right Handed buttons' -Text 'Mouse buttons are now configured for right hand' -TrayIcon Information -IconType Info
    }
} else {
    Write-Output ([System.Windows.Forms.SystemInformation]::MouseButtonsSwapped)
}