Check Windows installer version

The set keyword must precede the assignment of an OBJECT variable to a reference returned by the CreateObject function. For example:

function OnBegin( )
OBJECT oMSI;
begin
// create the object
set oMSI = CreateObject("WindowsInstaller.Installer");

// use the object (display MSI version on user's system)
MessageBox("Your MSI version is: " + oMSI.Version, INFORMATION);

// free the object
set oMSI = NOTHING;
end;