Close Windows by Title powershell

CloseWindowByTitle.ps1

Function CloseWindowByTitle([string]$TitleContains, [bool]$isExplorer, [bool]$isProgram) {
	if ($isExplorer -eq $null) {
		$isExplorer = $true
	}
	if ($isProgram -eq $null) {
		$isExplorer = $true
	}	
	
	if ($isProgram -eq $true) 
	{
		Write-Host "Check for running Programs '$TitleContains'"	
		#All Processes
		Get-Process | ForEach-Object {
			$WindowName = $_.MainWindowTitle
			if ((($WindowName).Trim()).length -ne 0) {
				if ($WindowName.Contains($TitleContains)) {
					Write-Host "'$WindowName' wird geschlossen"
					Stop-Process $_.ID
				}
			}
		}
	}
	
	if ($isExplorer -eq $true) 
	{
		Write-Host "Check for running Explorer '$TitleContains'"	
		#All Shell Applications
		$Applications = (New-Object -comObject Shell.Application).Windows() 
		$Applications | ForEach-Object {
			$WindowName = $_.LocationName
			if ($WindowName.Contains($TitleContains)) {
				Write-Host "'$WindowName' wird geschlossen"
				$_.Quit()
			}
		}
	}
}

CloseWindowByTitle -TitleContains "Command Prompt" -isExplorer $true -isProgram $false