Yeah, it would look something like:

<CustomAction Id="ActionId"
               Property="YourProperty"
               Value="[YourProperty]/stuff_to_concatenate" />

Or at least I think that's how it should work. It may be that you have to 
create 
a new property to hold the final value...

--

Eric Fesh
Customer Support Engineer/Software Test Engineer
Verari Systems Software, Inc.
110 12th Street North, Suite D103
Birmingham, AL 35203
Phone +1-205-397-3141 ext. 3149
Fax +1-205-397-3142
[EMAIL PROTECTED]
http://www.verarisoft.com/

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Brad Edwards wrote:
> You don't happen to have an example of how to do a custom action to do
> this do you?  I'm just learning this wix stuff and have no clue how to
> do a lot of this.  Thanks Eric.
> 
> Brad
> 
> -----Original Message-----
> From: Eric Fesh [mailto:[EMAIL PROTECTED] 
> Sent: Friday, August 25, 2006 12:09 PM
> To: Brad Edwards
> Cc: WiX-users@lists.sourceforge.net
> Subject: Re: [WiX-users] Setting a Property based on another Property
> 
> It's kinda funny, but you need to use a custom action to set the
> property. 
> Apparently MSI won't let you assign a property value from another
> property to 
> keep an infinite regress from happening.
> 
> 
> --
> 
> Eric Fesh
> Customer Support Engineer/Software Test Engineer
> Verari Systems Software, Inc.
> 110 12th Street North, Suite D103
> Birmingham, AL 35203
> Phone +1-205-397-3141 ext. 3149
> Fax +1-205-397-3142
> [EMAIL PROTECTED]
> http://www.verarisoft.com/
> 
> The information contained in this communication may be confidential and
> is
> intended only for the use of the recipient(s) named above.  If the
> reader of
> this communication is not the intended recipient(s), you are hereby
> notified
> that any dissemination, distribution, or copying of this communication,
> or
> any of its contents, is strictly prohibited.  If you are not a named
> recipient or received this communication by mistake, please notify the
> sender
> and delete the communication and all copies of it.
> 
> 
> Brad Edwards wrote:
>> During the install the user is asked for the directory where an
> already
>> existing application is.  The user types in "C:\Program Files\Foo".  I
>> then set the value of Property "INSTALLDIR"  to be that directory
> path.
>> Now that I have that path I want to copy files to a "bin" folder that
>> already exists under that directory path.  I'm using CopyFile with a
>> DestinationProperty, so I need to create a Property, let's say
>> "INSTALLBINDIR", and concatenate the INSTALLDIR property with "\bin"
> to
>> make the new Property.  How can I do this or can it be done...and if
> it
>> can't be done what can I do to accomplish this?  Thanks.
>>
>>  
>>
>> Brad
>>
>>
>>
>>
>>
> ------------------------------------------------------------------------
>>
> ------------------------------------------------------------------------
> -
>> Using Tomcat but need to do more? Need to support web services,
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>> Get stuff done quickly with pre-integrated technology to make your job
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>>
>>
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> 
> 
> -------------------------------------------------------------------------
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> Get stuff done quickly with pre-integrated technology to make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
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-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
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