Is MsiOpenProduct the correct way to read properties from an installed product?

Question

Given an MSI product code I want to get the upgrade code (among other properties) from an already installed product. I have tried this by calling the MsiOpenProduct method,

Answer 1

For the information you want, it sounds like you can just call ::MsiGetProductInfo(). ::MsiOpenDatabase() is a very slow operation while ::MsiGetProductInfo() is (IIRC) more on par with registry look ups.