C++/CX read file from absolute url

I am working on a WinRT Component, which is written in C++/CX. In the C# side, I get a StorageFile from CameralRoll then I pass file.Path to the WinRT component. How can I read the file data to IInputStream from the url ?

The url C# file.Path:

file:///C:/Data/Users/Public/Pictures/Camera%20Roll/04ede9ed-dafe-4d32-902a-206baa28006b.gif