Re: To MsgBox, or not to MsgBox

From: J French (erewhon_at_nowhere.com)
Date: 03/27/04 

Date: Sat, 27 Mar 2004 12:10:04 +0000 (UTC)

On Sat, 27 Mar 2004 10:32:45 -0000, "Tony Proctor"
<tony_proctor@aimtechnology_NOSPAM.com> wrote:

>Does anyone know of a test that will indicate whether a MsgBox call is
>legal, i.e. whether the current process/thread has access to a UI
>
>Some situations (e.g. services, IIS, silent installs over a reboot) will
>result in a hang if MsgBox is called. I accept the argument that such code
>should not use MsgBox, but this is a common component and it's not actually
>my "call".

In the cases you are thinking of, by 'hang' do you mean stick an
semi-ownerless MessageBox on the screen, or something nastier ?

Even a Console Mode App can generate a MessageBox

This silly little demo might give you some ideas :-

Sub Main()
    App.TaskVisible = False
    If App.UnattendedApp Then
       MsgBox "Wha Hay" + Str$(App.TaskVisible)
    End If
End Sub

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