PathIsRootW function (shlwapi.h)

Článek
02/22/2024

Determines whether a path string refers to the root of a volume.

Syntax

BOOL PathIsRootW(
  [in] LPCWSTR pszPath
);

Parameters

[in] pszPath

Type: LPCTSTR

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

Return value

Type: BOOL

Returns TRUE if the specified path is a root, or FALSE otherwise.

Remarks

Returns TRUE for paths such as "", "X:" or "\\server\share". Paths such as "..\path2" or "\\server" return FALSE.

Examples

#include <windows.h>
#include <iostream.h>
#include "Shlwapi.h"

void main( void )
{
// String path name 1.
char buffer_1[ ] = "C:\\";
char *lpStr1;
lpStr1 = buffer_1;

// String path name 2.
char buffer_2[ ] = "path\\file";
char *lpStr2;
lpStr2 = buffer_2;

// Variable to get the return from "PathIsRoot".
int retval;

// Test case with path not absolute.
retval = PathIsRoot(lpStr1);
cout << "The return from function is       :" << retval << endl;
cout << "The path does contain a root part :" << lpStr1 << endl;

// Test case with path absolute.
retval = PathIsRoot(lpStr2);
cout << "The return from function is       :" << retval << endl;
cout << "The path does not contain part    :" << lpStr2 << endl;
}

OUTPUT:
============
The return from function is       :1
The path does contain a root part :C:\
The return from function is       :0
The path does not contain part    :path\file
============

Note

The shlwapi.h header defines PathIsRoot 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.

Requirements

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)

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