Hi,
You cannot use a DLL written in a VB as a custom action because it does not support the "stdcall" function calling convention.
For more details about the requirements for a function used as a custom action see the following page:
http://msdn2.microsoft.com/en-us/library/aa368338.aspx
In conclusion you cannot access properties in a VB DLL.
Regards,
Daniela
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Daniela Petrescu
Advanced Installer Team
http://www.advancedinstaller.com