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Editorial Team
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Asked: 2026-05-25T03:16:33+00:00

In my custom actions, I’ve used MessageBox.Show() to show a dialog whether needed. For

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In my custom actions, I’ve used MessageBox.Show() to show a dialog whether needed. For ex: during database installation, I’d like to show a message to user if any error. But the message box is not set as a child of Wix window by default, thus the end-user can leave the message box and touch the Back, Next button …

Is there any way to set the message box as a child of the main Wix installer window?

Thanks in advance,

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1 Answer

  1. Editorial Team

    There are bad ways and good ways. The bad ways involve FindWindow calls so you can parent appropriately. The good ways involve calls to MsiProcessMessage, Session.Message, or whatever wrapper is available. However if this custom action is being invoked from a DoAction ControlEvent, the latter will not work.

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