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I have an dialog application and I want to run that application exe once at a time i.e. when I run the exe of that application then I can not open another instance of the same application at the same time.How can ??
Posted 17-Apr-13 21:58pm
debarunb1.1K
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Solution 1

Just check on your InitInstance method (or anywhere else at the start of your program) whether a process with this name is already running. If so, exit.
 
Stumbled upon this quickly
 
How to check if an application is already running [^]
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Solution 2

See the MSDN article How to write an application that supports fast user switching in Windows XP[^]. The section Detect an Existing Application Instance describes how to add code to check if another instance is already running even when started by another user.
 
[EDIT]
An example with good explanations can be also found at Avoiding Multiple Instances of an Application[^].
[/EDIT]
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