How do I publish a CustomAction when Dialog is showing - wix

Question

I have following Fragment to define my CustomActions (actually 2 methods in my CA-project)
<Fragment>
<Binary Id="FooAssembly"
SourceFile="Foo.CA.dll" />
<CustomAction Id="Action1"
BinaryKey="FooAssembly"
DllEntry="Action1" />
<CustomAction Id="Action2"
BinaryKey="FooAssembly"
DllEntry="Action2" />
</Fragment>
My Action1 looks like this:
[Microsoft.Deployment.WindowsInstaller.CustomAction]
public static ActionResult Action1(Microsoft.Deployment.WindowsInstaller.Session session)
{
session["value1"] = "some value";
session["value2"] = "some value";
return ActionResult.Success;
}
Now I need to run this CustomAction when my dialog is showing and bind the value value1 to a Edit-control like so:
<Dialog Id="FooDlg">
<Control Id="FooEdit"
Type="Edit"
Text="[value1]"
Property="value1"
Disabled="yes" />
</Dialog>
My InstallUISequence looks like this
<InstallUISequence>
<Show Dialog="FooDlg"
After="CostFinalize" />
</InstallUISequence>
I am using an Edit-control here, because I need some border - which Text is missing - and therefore I need to have the attribute Property filled.
How can I achieve this?

Answer 1

I have solved this by adapting my InstallUISequence like
<InstallUISequence>
<Custom Action="Action1"
After="CostFinalize" />
<Show Dialog="FooDlg"
After="Action1" />
</InstallUISequence>