Resolve absolute path from relative path and/or file name

Question

Is there a way in a Windows batch script to return an absolute path from a value containing a filename and/or relative path?

Given:

Answer 1

stijn's solution works with subfolders under C:\Program Files (86)\,

@echo off
set projectDirMc=test.txt

for /f "delims=" %%a in ('powershell -Command "[System.IO.Path]::GetFullPath( '%projectDirMc%' )"') do @set resolvedPath=%%a

echo full path:    %resolvedPath%