Allow only one application instance

Question

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.

@SLaks: It's not entirely unreasonable; ever try to open a second instance of Skype? Personally there are some cases where it would be _more_ annoying to get a new instance rather than be dropped into an existing one. — Geoff, Apr 24 '13 at 16:11

score 19 · Accepted Answer · edited May 23 '17 at 10:29

19

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:

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edited May 23 '17 at 10:29

Community

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answered Apr 24 '13 at 15:49

Geoff

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Thank you so much. I'll try. – Norak Apr 25 '13 at 03:09
can u imagine that I'm using a code to check if the process is running to allow only one instance of my application :( just found this solution now, thanks, I feel stupid :) – Osama Gadour May 21 '22 at 20:04

score 0 · Answer 2 · answered Jul 21 '14 at 17:18

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Use the “Make single instance application” flag; in the solution explorer

answered Jul 21 '14 at 17:18

Amr Moussa

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duplicate answer same as geoff – GNMercado Nov 24 '16 at 09:01

Allow only one application instance

2 Answers2

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