The SQLRTInitialize2() cannot be used in deferred custom actions because it needs to access to the Binary table. What are you trying to accomplish using the function? ... View more

🙂 Function to remove occurences of certain string from end of provided string. prototype STRING TrimEnd(STRING, STRING); /// ///Removes all occcurences of the trim string at the end of original /// string. /// /// String to be trimmed at end. /// // String to be removed from the end of original string. /// function STRING TrimEnd(szString, szTrim) STRING szReturn; INT ivStartIndex; INT ivTrimLength; begin szReturn = szString; ivTrimLength = StrLength(szTrim); ivStartIndex = StrLength(szReturn) - ivTrimLength; while(StrFindEx(szReturn,szTrim, ivStartIndex) > 0) StrReplace(szReturn, szTrim,"",ivStartIndex); ivStartIndex = StrLength(szReturn) - ivTrimLength; endwhile; return szReturn; end; ... View more

As an aside, I believe there's another example at www.installsite.org > Windows Installer > Custom Actions > Darwin Transform and Its Application in Windows Installer Custom Actions. (Standard caution about using undocumented registry keys instead of MSI API functions.) ... View more

Given a product code GUID, the MsiGetProductInfo function (or Installer.ProductInfo in VBScript) can give you installed-product information; if you don't have a hard-coded ProductCode in mind, you can use the product code or codes obtained by the FindRelatedProducts action. ... View more