VBScript Open Another Program And Wait Until Closed

VBScript is a scripting language to manage computer developed by Microsoft. Below is a code snippet to open an external program suppose named "firefox.exe" and wait until firefox closed. Script will not be execute further statements until firefox closed. 

Dim objShell

ShowOption = 1
WaitUntilClose = True

Set objShell = WScript.CreateObject( "WScript.Shell" )
objShell.Run """C:\Program Files\Mozilla Firefox\firefox.exe""", ShowOption, WaitUntilClose
Set objShell = Nothing

'ShowOption
'0 Hide the window (and activate another window.)
'1 Activate and display the window. (restore size and position) Specify this flag when displaying a window for the first time. 
'2 Activate & minimize. 
'3 Activate & maximize. 
'4 Restore. The active window remains active. 
'5 Activate & Restore. 
'6 Minimize & activate the next top-level window in the Z order. 
'7 Minimize. The active window remains active. 
'8 Display the window in its current state. The active window remains active. 
'9 Restore & Activate. Specify this flag when restoring a minimized window. 
'10 Sets the show-state based on the state of the program that started the application.