Powershell/Powershell Studio 2012 - Help with Global Variables!

Hello,

I tried searching through the forums and Google, but could not find what I wanted, but if someone knows of a thread/article, please post!

Problem:  In Powershell Studio 2012, I would like to set a global variable, so that it passes along the information from each button to the next.

Scenario: My first button would grab the user's information and then the second button will use that information to do other things

$buttonGetInfo_Click = {
$UserInfo = Get-QADUser user
$Firstname = UserInfo.Firstname
$Lastname = UserInfo.Lastname
}

$buttonDoSomething_Click = {

[System.Windows.Forms.MessageBox]::Show("$Firstname $Lastname")
}

What I've tried:

1. I think that it would all work if I rename each variable to $global:Firstname, $global:Lastname, etc... but that's a hassle

2. I tried putting

Set-Variable -Name Firstname -Scope Global

and also tried: 

New-Variable -Name Firstname -Scope Global

Is there a way to do this so I don't have to type in "$global:..." each time?

Thanks!