How to extend the message area available for a condition message

[JETMikeMc]

I am using a WixStandardBootstrapperApplication.HyperlinkLargeLicense as the application ref in my installer. It is a WixStandardBootstrapperApplication type with a logo, I have a message that displays based on a condition in a form like:

<bal:Condition Message="$(var.MyErrorDescription)">
(NOT XInstalled)

The message in the define variable MyErrorDescription is rather long. It is getting cut off on the last line of the message on the dialog screen. Is there a way to provide a custom size/area for this message?

[robmen]

IIRC, you have to update the theme file.