How do I create a custom dialog in WiX for user input?

Question

I'm using WiX to create an installer for a windows service. It's desirable that the name of service that gets installed and displayed in Services is configurable at install time.

For example, this is what I'm thinking (wix xml snip):

<ServiceInstall 
    Id="MyServiceInstaller" 
    Name="NAME_PASSED_FROM_DIALOG" 
    Type="ownProcess" 
    Start="auto" 
    ErrorControl="normal" 
    Description="My Service" 
    Account="localsystem"/> 

<ServiceControl
    Id="StartMyServiceInstaller" 
    Name="NAME_PASSED_FROM_DIALOG" 
    Start="install"
    Wait="no" />

<ServiceControl
    Id="StopMyServiceInstaller" 
    Name="NAME_PASSED_FROM_DIALOG" 
    Remove="uninstall"
    Stop="both"
    Wait="yes" />

NAME_PASSED_FROM_DIALOG is something I would like to hook up to a custom dialog that gets created and gets displayed to the person installing the service so they can set/modify the service name. I think this is very similar to the WIXUI_INSTALLDIR property that gets set and passed to the WixUI_InstallDir Dialog Set.

My question is:

How do I create a custom UI dialog that can accept user input which gets passed into runtime of the installer?

Answer 1

Have fun with UI!

Edit: The original link to answer doesn't exist anymore. FireGiant (the maintainers of Wix) some examples for part of this process, but it's doesn't completely answer this question. There is one further tutorial (UPDATE Aug.2018: Link resurrected from Wayback Machine) that does go most of the way to answer this question.

A high level overview of what will be happening is:

1. Create a property
2. Have the UI control set this property
3. The name attribute on the service will reference the property, ie [ServiceNameProperty].

However this is complex, and the way that is suggested to create a new UI dialog, is to take an existing dialog, make a clone of it, and then edit with new text, controls and use it to populate the property.