In article <4d6ef6e1711cde4e93d1f1e591a614d6345...@nl1mail0302.global.sdl.corp>,
"Igor Paniushkin" <[email protected]> writes:
> It is not really related to your question, but I had a question about
> popup message box from custom action and I got an answer from Bob
> Arnson:
> Set a property in the CA and use that property as the condition in a
> SpawnDialog control event to show a message box. Never show UI from a
> CA; there's no way to get the same UI level information that MSI uses to
> determine whether UI should be shown.
> So probably try to change not to popup message box from CA, but
> SpawnDialog (new dialog?) from installer UI and maybe after closing it,
> you will have a correct focus.
I agree with Bob, you should not be calling MessageBox directly from a
CA. However, there is a way to have Windows Installer display a
message box from a CA with ::MsiProcessMessage. I've used this to
detect error conditions and conditionally fail a deferred CA based on
a yes/no response from the user. If you use MsiProcessMessage, than
even a deferred CA can display a message box.
For immediate UI related CAs, its better to use the SpawnDialog
approach however.
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