Checks which button was pushed by the user during the most recent MsgBox command.
Can be any of the following strings to represent which button the user pressed in the most recent MsgBox command:
MsgBox, 4, , Would you like to continue?, 5 ; 5-second timeout. IfMsgBox, No Return ; User pressed the "No" button. IfMsgBox, Timeout Return ; i.e. Assume "No" if it timed out. ; Otherwise, continue: ...