Think-time functions suspend processing until the user has taken some action such as clicking a button in amessage box or until an external process has run to completion (example some remote process)
Following are Think time functions:
DoCancel
DoModal
DoModalComponent
Exec (only when Synchronous)
File attach functions
Prompt
RemoteCall
RevalidatePassword
WinExec(only when Synchronous)
WinMessage and WinMessageBox