Don't know how to set the INSTALLDIR Property

[Marc-Florian Wendland]

Hello,
I guess it is not really a problem for old Windows Installer guys, but I'm a newbie at Windows Installer and WiX,.

How can I set the INSTALLDIR-Property?
The Online Tutorial means, that Property has been set by buidling the directory structure, starting with the virtual TARGETDIR, like this:

              <Directory Id='TARGETDIR' Name='SourceDir'>
                        <Directory Id='ProgramFilesFolder' Name='PFiles'>
                           <Directory Id='FIRMA' Name='MyFactory'>
                               <Directory Id='INSTALLDIR' Name='Product''>
                                        ....
                                        </Directory>
                                </Directory>
                        </Directory>
                </Directory>

Later during the installaion process, i wanted to reference to that directory, by showing the suggested path:

<Control Id="Location" Type="Text" X="57" Y="65" Width="240" Height="40" Property="_BrowseProperty">
        <Text>[INSTALLDIR]</Text>
</Control>

And a button to change the directory:

 <Control Id="ChangeFolder" Type="PushButton" X="301" Y="65" Width="66" Height="17">
     <Text><![CDATA[{&Tahoma8}&Change...]]></Text>
     <Publish Event="SpawnDialog" Value="InstallChangeFolder">1</Publish>
     <Publish Property="_BrowseProperty" Value="INSTALLDIR">1</Publish>
</Control>

But my problem is, that the first Control-text-Element didn't work, so all following dialogs either. I don't know how to set the main INSTALLDIR.

I know that this is a kidding question and at the week-end i'm going to read a Windows Installer book, to improve my knowledge, but now, it would be a very useful help, to get a answer to my question.

So long, thanks,
Florian Wendland