PathGetDriveNumberA function (shlwapi.h)

Searches a path for a drive letter within the range of 'A' to 'Z' and returns the corresponding drive number.


int PathGetDriveNumberA(
  [in] LPCSTR pszPath


[in] pszPath


A pointer to a null-terminated string of maximum length MAX_PATH that contains the path to be searched.

Return value

Type: int

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



The shlwapi.h header defines PathGetDriveNumber as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.


Requirement Value
Minimum supported client Windows 2000 Professional, Windows XP [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header shlwapi.h
Library Shlwapi.lib
DLL Shlwapi.dll (version 4.71 or later)