I use the following to show an error message from my C# custom actions: Record record = new Record(); record.FormatString = "My Error"; session.Message(InstallMessage.Error | (InstallMessage)System.Windows.Forms.MessageBoxIcon.Error | (InstallMessage)System.Windows.Forms.MessageBoxButtons.OK, record); -- View this message in context: http://n2.nabble.com/Show-Dialog-from-C-Custom-Action-tp4823643p4831674.html Sent from the wix-users mailing list archive at Nabble.com.
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