About opening exe

[veerakalai]

Is there is any way to open the exe(executable) only once. when tried to open the exe next time it should not be opened.

[sunny_sz]

FindWindow is what u want .

[VictorN]

FindWindow is what u want .

Wrong!

The correct way is described in J.Newcomer's essay Avoiding Multiple Instances of an Application

[sunny_sz]

Wrong!

The correct way is decribed in J.Newcomer's essay Avoiding Multiple Instances of an Application

I wanna know why that is wrong ?? Pls. advise !

[VictorN]

Joe Newcomer described it very good in the essay I referred to in my previous post.
Is it so hard to read it?

PS.
OK, the simplest example: application is windowless.
More complicated example: application needs (for some reasons) some time to create the main window, and during this time period user started this application again.

[sunny_sz]

But what veerakalai want is that when a window(e.g. a .exe file is running) is running , if user open it again , it should not be opened again, I mean , by using findwindow function, we may find this window of this .exe file and check whether this file is running or not , if we find this handle of this window, we can prevent it opened again, right ??