[wix-users] Strange syntax in installer

Arnette, Bill bill.arnette at signalscape.com
Thu Jun 29 13:55:32 PDT 2017

The IIS Media Services 4.1 installer (which appears to be created with Wix) has the following launch condition which prevents it from installing on Windows 10 (IIS 10)

(IISMAJORVERSION >= "#7") OR (Installed)

What does the # in the above string literal mean?  I don't see any mention of it in Wix or Windows Installer documentation about LaunchCondition syntax.

Note that IISMAJORVERSION is set from a registry search which, on Windows 10, is REG_DWORD 0xA


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