block flow until a condition is met

Hi all,
I hope this is not too trivial question.
I'd like to stop the installation process until a custom function return true, is there a way to poll the function repeteadly? Or is there a way to control the "Next" button in order to pass to the next page only if my condition is true?

thanks in advance

Just have a loop with a Sleep 1000 in it.

Loop:

 Call Function

 Pop $R0

 StrCmp $R0 1 +3

  Sleep 1000

  Goto Loop

-Stu

Hi,
thanks for answering, this could be a way, I was wondering how to do that in a cleaner way, I mean check only when user wants to pass to the other page and stay in my page while the condition is false.

thanks again

bye

You can create a custom post function (that is called when the code is getting ready to leave the current page).

Page License "" "" LicensePost

...

Function LicensePost

    Call MyFunction

    Pop $0

    StrCmp $0 1 +2

    Abort

FunctionEnd