Hooray! Yes, that works perfectly now. Thank you Pally.

Pally Sandher wrote:
> http://msdn.microsoft.com/en-us/library/aa372039(VS.85).aspx
> WelcomeDlg is part of InstallUISequence. Run your Type 51 Custom Action
> in it with Before="WelcomeDlg" & it should work.
>
> Palbinder Sandher 
> Software Deployment & IT Administrator
> T: +44 (0) 141 945 8500 
> F: +44 (0) 141 945 8501 
>
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>
> -----Original Message-----
> From: Jonathan Hartley [mailto:tart...@tartley.com] 
> Sent: 05 October 2009 15:55
> To: General discussion for Windows Installer XML toolset.
> Subject: [WiX-users] modifying Welcome Dialog text on upgrade vs install
>
> Hey there,
>
> I would like the UI to display a slightly different message to the user
> when we are upgrading (or downgrading) than the standard welcome dialog
> that is displayed on install.
>
> To achieve this, I am trying to conditionally populate a property with
> the text we would like to display, which differs depending on whether we
> are installing or upgrading:
>
>     <!-- set welcome message depending on if we are installing or
> upgrading -->
>     <CustomAction Id="IsInstalling" Property="RESOLVER_WELCOME_TEXT" 
> Value="installing text" />
>     <CustomAction Id="IsUpgrading" Property="RESOLVER_WELCOME_TEXT" 
> Value="upgrading text" />
>     <InstallExecuteSequence>
>       <Custom Action="IsInstalling" After="FindRelatedProducts">NOT
> OLDERVERSIONDETECTED</Custom>
>       <Custom Action="IsUpgrading" 
> After="IsInstalling">OLDERVERSIONDETECTED</Custom>
>     </InstallExecuteSequence>
>
> and then display the value of this property in my custom Welcome Dialog,
> by defining its description text control with:
>
>                 <Control Id="Description" Type="Text"
>                      X="135" Y="80"
>                      Width="220" Height="60"
>                      Transparent="yes"
>                      NoPrefix="yes"
>                      Text="Hello
> [RESOLVER_WELCOME_TEXT][WIXUI_INSTALLDIR]" />
>
> When I compile this, the welcome dialog does display the text "Hello
> C:\Program Files\Resolver One". So the custom dialog is clearly being
> displayed, and the property WIXUI_INSTALLDIR is being dereferenced. 
> Presumably my custom property (RESOLVER_WELCOME_TEXT) is either never
> being set, or is set sometime after this welcome dialog is displayed.
>
> We tried displaying this property on the ExitDialog too, but it appeared
> blank there as well - so it looks like our property is never being set.
>
> We tried replacing the condition in our custom action (NOT
> OLDERVERSIONDETECTED) with 1, but this didn't change anything.
>
> We have a second InstallExecuteSequence later in our main .wxs file. We
> tried merging the two, in case the second definition replaced the first,
> but to no avail.
>
> Any help is much appreciated. Are we even going about this the right
> way?
>
> Thanks,
>
>     Jonathan
>
>   

-- 
Jonathan Hartley      Made of meat.      http://tartley.com
tart...@tartley.com   +44 7737 062 225   twitter/skype: tartley



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