Oh I just came up with an idea - have you tried scheduling a custom action
directly after your PrepareDlg that sleeps for a few seconds? I used this
and it seemed to work:
Product.wxs:
<CustomAction Id="Snooze" BinaryKey="ManagedCaDll" DllEntry="Snooze" />
<InstallUISequence>
<Custom Action="Snooze" After="PrepareDlg">1</Custom>
</InstallUISequence>
CustomAction.cs:
using System;
using Microsoft.Deployment.WindowsInstaller;
namespace ManagedCA
{
public class CustomActions
{
[CustomAction]
public static ActionResult Snooze(Session session)
{
System.Threading.Thread.Sleep(5000);
return ActionResult.Success;
}
}
}
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