Copying Registry values

WiX doesn't provide a specific element for copying data from one registry value to another. However, you can accomplish this task by pairing a RegistrySearch element with a RegistryValue. First, you'll store the value in a property by using a RegistrySearch. Then, you'll reference that property in the Value attribute of the RegistryValue element. Here's an example:

<Property Id="MY_REG_VALUE">
  <RegistrySearch Id="MyRegistrySearch"
                  Root="HKLM" 
                  Key="Software\MyCompany\MyKey"
                  Name="MyDWORDValue" 
                  Type="raw" />
</Property>

<DirectoryRef Id="INSTALLLOCATION">
  <Component Id="CMP_CopyRegValue" 
             Guid="747965AA-90F4-4262-BE55-3C1F4F7F65B4">
     <RegistryValue Id="MyRegistryValue" 
                    KeyPath="yes" 
                    Root="HKLM" 
                    Key="Software\MyCompany\MyKey" 
                    Name="MyCopiedValue" 
          ...