Set-MonitorInputSource - wraps around the ControlMyMonitor.exe

Set-MonitorInputSource.ps1

function Set-MonitorInputSource {
    <#
        .SYNOPSIS
        Helper function to set the monitor state.

        .EXAMPLE Switch to HDMI
        Set-MonitorInputSource -InputSource HDMI

        .EXAMPLE Switch to DisplayPort
        Set-MonitorInputSource -InputSource DisplayPort

        .EXAMPLE Switch to DisplayPort for monitor 1 and monitor 2
        Set-MonitorInputSource -InputSource DisplayPort -Monitor 1
        Start-Sleep -Milliseconds 300
        Set-MonitorInputSource -InputSource DisplayPort -Monitor 2

        .NOTES
        # https://www.nirsoft.net/utils/control_my_monitor.html
        # https://johnstonsoftwaresolutions.com/2019/02/09/tip-switch-monitor-inputs-with-command-line/
    #>
    [CmdletBinding()]
    param(
        [parameter(Mandatory = $true)]
        [ValidateSet('HDMI', 'DisplayPort')]
        [string]$InputSource,

        [ValidateSet('1', '2')]
        [string]$Monitor = '1',

        [string]$ExePath = "$env:AppData\ControlMyMonitor.exe"
    )
    if (Test-Path $ExePath) {
        $monitorHash = @{
            '1' = @{
                Name            = '\\.\DISPLAY1\Monitor0'
                InputSourceHash = @{
                    'DisplayPort' = 15
                    'HDMI'        = 17
                }

            }
            '2' = @{
                Name            = '\\.\DISPLAY2\Monitor0'
                InputSourceHash = @{
                    'DisplayPort' = 15
                    'HDMI'        = 17
                }
            }
        }
        [string]$ExePath = "$env:AppData\ControlMyMonitor.exe"
        $argList = @(
            '/SetValueIfNeeded'
            $monitorHash[$Monitor].Name
            '60'
            $monitorHash[$Monitor].InputSourceHash[$InputSource]
        )
        Start-Process -FilePath $ExePath -ArgumentList $argList -Wait
    } else {
        Write-Warning "Unable to locate ControlMyMonitor.exe at: [$ExePath]"
    }
}