Why are background windows are not responding for PostMessage method, Where the foreground windows are working fine?

pradeep,krishna has asked for the wisdom of the Perl Monks concerning the following question:

Hi fellow monks...

I have the following code to
-> To find the login window(Which may be present in background
->And press ENTER key on all the windows found.

@Login_Windows = FindWindowLike(0, "Login");
for(@Login_Windows )
{  PostMessage($_, SendKeys("~"), 13, 0);  }
[download]

The code is working fine if the "Login" windows are in foreground, but none of the background windows are responding for the code.
I know that SendKeys function works only on the foreground windows. So i have used inside PostMessage method.
I don't know whether my code is wrong or not.
If the code itself is wrong, guide me with the correct method.
Help me in solving this.
Thanks in advance....
Pradeep Krishna

Comment on Why are background windows are not responding for PostMessage method, Where the foreground windows are working fine? Download Code

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Re: Why are background windows are not responding for PostMessage method, Where the foreground windows are working fine? by Anonymous Monk on Apr 01, 2014 at 09:33 UTC
because you can't just make stuff up and expect anyone, even windows , to like it	[reply]
Re: Why are background windows are not responding for PostMessage method, Where the foreground windows are working fine? by Corion (Patriarch) on Apr 02, 2014 at 07:34 UTC
Your approach does likely not work because `PostMessage()` is not documented to use `SendKeys()` as an argument. Where is the documentation where your approach is documented?	[reply] [d/l] [select]