Function and cmdlet parameters basically are the technique how PowerShell creates „user interfaces“. These text-based interfaces can easily be turned into graphical interfaces.
If you’d like to send a mail message, you could use Send-MailMessage and provide the details via text-based parameters. Or, you could create a graphical interface and name it Send-MailMessageUI:
#requires -Version 3.0
function Send-MailMessageUI
{
Show-Command -Name Send-MailMessage
}
Send-MailMessageUI
Now, when you run Send-MailMessageUI, all parameters are turned into text fields and checkboxes. Even a non-scripter can now fill out this form, then click „Run“ to execute the command.
