Check file version from file full path - wix

Question

I need to check service executable version before proceed my installation.
I have read full path for registered service, from registry:
<Property Id="SOME_SERVICE_PATH">
<RegistrySearch Id="FindServicePath" Type="raw" Root="HKLM" Key="SYSTEM\CurrentControlSet\Services\TARGET_SERVICE" Name="ImagePath" />
</Property>
After that I tried to perform file search like below:
<Property Id="TARGET_SERVICE_UNSUPPORTED">
<DirectorySearch Id="ServiceParticularVersionSearch" Path="[SOME_SERVICE_PATH]">
<FileSearch Name="Service.exe" MaxVersion="2.5.0.1" />
</DirectorySearch>
</Property>
And this not ganed me results.
I suppose the problem is in the value I passed to DirectorySearch Path property.
According to the Wix documentaion Path should be initialized with
"Path on the user's system. Either absolute, or relative to containing directories"
Unfortunately, there is no place in the registry I can read service installation directory. This is 3d party component.
Are there any solutions here? important moment - Its forbidden to use custom actions in our project

Answer 1

As it turned out, the answer was in Type parameter of RegistrySearch element. If I assign "file" to it, I will be able to apply FileSearch on path I read and check executable version.
Another solution here is to use remark from RegistrySearch Element documentation
file
The registry value contains the path to a file. To return the full file path you must add a FileSearch element as a child of this element; otherwise, the parent directory of the file path is returned.
I mean "otherwise, the parent directory of the file path is returned"
Solution 1
<Property Id="TARGET_SERVICE_UNSUPPORTED">
<RegistrySearch Id="FindServicePath" Type="file" Root="HKLM" Key="SYSTEM\CurrentControlSet\Services\TARGET_SERVICE" Name="ImagePath" />
<FileSearch Name="Service.exe" MaxVersion="2.5.0.1" />
</DirectorySearch>
</Property>
Solution 2
<Property Id="SOME_SERVICE_PATH">
<RegistrySearch Id="FindServicePath" Type="file" Root="HKLM" Key="SYSTEM\CurrentControlSet\Services\TARGET_SERVICE" Name="ImagePath" />
</Property>
<Property Id="TARGET_SERVICE_UNSUPPORTED">
<DirectorySearch Id="ServiceParticularVersionSearch" Path="[SOME_SERVICE_PATH]">
<FileSearch Name="Service.exe" MaxVersion="2.5.0.1" />
</DirectorySearch>
</Property>