On 29/05/2012 04:14, Ravi Raj wrote:
> But there are several messages I ant to populate via custom actions. I am
> not sure how to do this. Can you help me with some examples.

If you know the title of your dialog, you can get a handle to it by 
calling FindWindow("MsiDialogCloseClass", "My dialog title").  You can 
then use this as the owning HWND when calling MessageBox().

Rob


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