Revers find file in windows, C++ (vc++)

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//Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x86
//#define _UNICODE
//#define UNICODE
#include <stdio.h>
#include <windows.h>
#include <tchar.h>

BOOL IsRoot(LPCTSTR lptszPath)
{
    _TCHAR tszRoot[4];
    _stprintf_s(tszRoot, _T("%c:\\"), lptszPath[0]);
    return (_tcscmp(tszRoot, lptszPath) == 0);
}

void FindInAll(LPCTSTR lptszPath)
{
    _TCHAR tszFind[MAX_PATH];
    _tcscpy_s(tszFind, lptszPath);
    if (!IsRoot(tszFind))
    _tcscat_s(tszFind, _T("\\"));
    _tcscat_s(tszFind, _T("*.*")); // Find all pattern
    WIN32_FIND_DATA wfd;
    HANDLE hFind = FindFirstFile(tszFind, &wfd);
    if (hFind == INVALID_HANDLE_VALUE)
    return;

do
    {
        if (wfd.cFileName[0] == _T('.'))
            continue;
        if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
        {
            _TCHAR tszFile[MAX_PATH];
            if (IsRoot(lptszPath))
                _stprintf_s(tszFile, _T("%s%s"), lptszPath, wfd.cFileName);
            else
                _stprintf_s(tszFile, _T("%s\\%s"), lptszPath, wfd.cFileName);
            FindInAll(tszFile);
        }
        else
        {
            _TCHAR tszFile[MAX_PATH];
            if (IsRoot(lptszPath))
                _stprintf_s(tszFile, _T("%s%s"), lptszPath, wfd.cFileName);
            else
                _stprintf_s(tszFile, _T("%s\\%s"), lptszPath, wfd.cFileName);
            _tprintf(_T("%s\n"), tszFile);
        }
    } while (FindNextFile(hFind, &wfd));
    FindClose(hFind);

}

int main() {
	
	FindInAll(_T("windows"));
	return 0;
}

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Compilation time: 1,73 sec, absolute running time: 0,35 sec, absolute service time: 2,09 sec