...I must admit I'm a bit late with this reply, but still I think the
problem persists.
To be more specific, I include some snippets here. Things go on the same way
when I try to show/hide the control or affect the initial value of it.
Here's only the show/hide part, as I'm specifically interested in that - why
can't I get it work?
First, I initialize a global property with

    <Property
      Id="EXITDIALOGONCLOSEACTIONAPPLYCONTROLSHOW"
      Value="1"
    />

The checkbox is in my custom UI, on the exit dialog:
        <Control Type="CheckBox" Width="206" Height="13" X="158" Y="214"
Id="ExitDialogOnCloseActionApplyControl"
Text="[EXITDIALOGONCLOSEAPPLYCONTROL_TEXT]" CheckBoxValue="1"
Property="EXITDIALOGONCLOSEACTIONAPPLY">
          <Condition
Action="show">EXITDIALOGONCLOSEACTIONAPPLYCONTROLSHOW="1"</Condition>
          <Condition Action="hide">EXITDIALOGONCLOSEACTIONAPPLYCONTROLSHOW
&lt;&gt;"1"</Condition>
        </Control>

For the sake of a simplicity, I try to hide it with a simple custom action:

  <CustomAction Id="TestAction" Script="vbscript">
    Session.Property("EXITDIALOGONCLOSEACTIONAPPLYCONTROLSHOW") = ""
  </CustomAction>

Sequenced as
      <Custom Action="TestAction" Sequence="2" />

It does the modification (checked with MsgBox), and so on.
It still has no effect, while changing the property value in the property
element works appropriately.
Why?

2007/10/27, János Brezniczky <[EMAIL PROTECTED]>:
>
> First of all, thank you for answering.. my problem is that the checkboxsticks 
> to the value provided long before the script runs, no matter what
> value I provide, and if I don't specify one, it remains unchecked because of
> the default 'empty' value of the property. It seems to be immune to whatever
> I do, but I'll retry again, and give a feedback.
>
> Thanks till that time!
>
>
> 2007/10/27, Richard <[EMAIL PROTECTED]>:
> >
> >
> > In article <[EMAIL PROTECTED]
> > >,
> >    "=?ISO-8859-1?Q?J=E1nos_Brezniczky?=" <[EMAIL PROTECTED]>  writes:
> >
> > >   Does anyone know a way to accomplish the initialization I'm stuck
> > with?
> > > What am I overlooking?
> >
> > Check boxes toggle the property value between empty and whatever ends
> > up listed in the CheckBox table (WiX has an attribute that specifies
> > this value in the control element, IIRC).  If you initialize the
> > property to some other value, I don't think the checkbox will be
> > checked properly.
> > --
> > "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for
> > download
> >      < http://www.xmission.com/~legalize/book/download/index.html>
> >
> >        Legalize Adulthood! <http://blogs.xmission.com/legalize/>
> >
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>
>
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