Accessing WI-properties from vbscript

[grisu1976]

Hi,

it seems to me that under certain circumstances the access to Windows Installer properties from vbscript (in a custom action) does not work.

I have a custom action which executes vbscript code that is stored in the custom action itself. I created a Message Box which shows me the value of the WI property but it is empty. The property has a value in the property manager and this value still lives after calling the vbscript. So it seems to me that the access to the property doesn't work :-(

Any ideas?

thanks,
Carsten

[grisu1976]

I forgot: I'm accessing the WI property as follows:

sName = Session.Property("SPXWEB_VDIR_NAME")

[RobertDickau]

One possible cause is that most MSI properties are unavailable during deferred execution; about which see InstallShield Knowledge Base articles Q106229 and Q104413 at http://support.installshield.com/kb.

[grisu1976]

Yes, you're right - thanks :-)

But I do not exactly understand these knowledge base articles. Do they mean, that I can call MsiGetProperty directly from my vbscript?

And how do I call it? How do I pass the MSI-Handle to MsiGetProperty in my VBScript?

thanks,
Carsten

[RobertDickau]

I don't think you can prototype APIs in VBScript, so you'll need to continue to use Session.Property; the Session object is the equivalent of the MSIHANDLE argument used in C/InstallScript code.