Getting an DPI aware correct RECT from GetWindowRect from a external window

I'm in the process of making an application DPI Aware but I have a need to do a GetWindowRect on HWNDs from other applications. My problem is this works fine on applications that are also DPI Aware but how do I detect if the HWND handle is DPI virtualized e.g. scaled so I can scale it myself? Or are there other APIs I've missed which will give me the size of the window in a DPI aware way from a HWND from another process?

I've tried the LogicalToPhysicalPoint but that always seem to fail, possibly because the HWND doesn't belong to my application.