Help with window-detection

[Jojje67]

I have a task where one action is to press a button. There are two possible windows that can appear. I want two different actions depending of what windows that pop-ups.
Is there something like "if windowcaption = qwerty then dothis else dothat"?
Thanks in advanced...

[Oleg]

See {WindowExists()} system variable. Specify the part of window caption as a parameter.
You easily can create such construction

if {WindowExists(Notepad)} then
   do something
else
   do something else
end if