Windows: Set cursor size via script.

Set-PointerSize.ps1

<#
.SYNOPSIS
    Sets pointer size
.DESCRIPTION
    Can be used with e.g. desktop shortcuts to have a one-click solution    
    powershell.exe -NoLogo -ExecutionPolicy Bypass -Command ".\Set-PointerSize.ps1 -Size 5"
.EXAMPLE
    ./Set-PointerSize.ps1 -Size 3
    Sets the cursor size to 3
.EXAMPLE
    ./Set-PointerSize.ps1
    Sets the pointer size to default (2)
#>

[CmdletBinding()]
param (
    [Parameter()]
    [int]
    $Size = 2
)

$User32Signature = @'
[DllImport("user32.dll", EntryPoint = "SystemParametersInfo")]
public static extern bool SystemParametersInfo(
             uint uiAction,
             uint uiParam,
             uint pvParam,
             uint fWinIni);
'@

$User32 = Add-Type -MemberDefinition $User32Signature -Name WinAPICall -Namespace SystemParamInfo -PassThru
$PvParam = 16 * $Size

Write-Debug "Setting pointer size to $Size ($PvParam)."
$User32::SystemParametersInfo(0x2029, 0, $PvParam, 0x01)