问题
I'm sorry about my title may be it make you confusing (it's just I don't know what words should I use). My problem is I don't want to allow user to open my application multiple time. Please help. Thank you in advance.
回答1:
Use the “Make single instance application” flag; in the solution explorer, right-click the project and select properties. See this question for more details.
MSDN documentation here.
Screenshot:
回答2:
Use the “Make single instance application” flag; in the solution explorer
来源：https://stackoverflow.com/questions/16196424/allow-only-one-application-instance