Set-ConsoleWindowTitle - Set the PowerShell console window title to a custom message or a custom 'default' message.

Set-ConsoleWindowTitle.ps1

function Set-ConsoleWindowTitle {
	
	[cmdletbinding()]
	param (
		[parameter(Mandatory = $true,
				   Position = 0,
				   ParameterSetName = 'Default')]
		[validateset("Default", "Custom")]
		[string]$MessageType,
		
		[parameter(Mandatory = $false,
				   Position = 1,
				   ParameterSetName = 'Default')]
		[string]$Message
	) # param
	
	BEGIN {
		
		$defaultTitle = $host.ui.RawUI.WindowTitle = "$env:COMPUTERNAME - $env:USERNAME"
		
	} # BEGIN
	
	PROCESS {
		
		switch ($MessageType) {
			
			'Default' {
				
				if ($host.Name -eq 'ConsoleHost') {
					
					$host.ui.RawUI.WindowTitle = $defaultTitle
					
				} # end if
				
			} # Default
			
			'Custom' {
				
				if ($host.Name -eq 'ConsoleHost') {
					
					$host.ui.RawUI.WindowTitle = $Message
					
				} # end if
				
			} # Custom
			
		} # switch
		
	} # PROCESS
	
} # function Set-ConsoleWindowTitle