c++winapifilesystemsdrive-letter

Get drive letter from filename in Windows

Is there a Windows API function to extract the drive letter from a Windows path such as

U:\path\to\file.txt
\\?\U:\path\to\file.txt

while correctly sorting out 

relative\path\to\file.txt:alternate-stream

etc?

Solution

  • PathGetDriveNumber returns 0 through 25 (corresponding to 'A' through 'Z') if the path has a drive letter, or -1 otherwise.