#include <windows.h>#include <tchar.h> #include <stdio.h>#include <strsafe.h>#pragma comment(lib, "User32.lib")void DisplayErrorBox(LPTSTR lpszFunction);int _tmain(int argc, TCHAR *argv[]){ WIN32_FIND_DATA ffd; LARGE_INTEGER filesize; TCHAR szDir[MAX_PATH]; size_t length_of_arg; HANDLE hFind = INVALID_HANDLE_VALUE; DWORD dwError=0; // If the directory is not specified as a command-line argument, // print usage. if(argc != 2) { _tprintf(TEXT("\nUsage: %s <directory name>\n"), argv[0]); return (-1); } // Check that the input path plus 3 is not longer than MAX_PATH. // Three characters are for the "\*" plus NULL appended below. StringCchLength(argv[1], MAX_PATH, &length_of_arg); if (length_of_arg > (MAX_PATH - 3)) { _tprintf(TEXT("\nDirectory path is too long.\n")); return (-1); } _tprintf(TEXT("\nTarget directory is %s\n\n"), argv[1]); // Prepare string for use with FindFile functions. First, copy the // string to a buffer, then append '\*' to the directory name. StringCchCopy(szDir, MAX_PATH, argv[1]); StringCchCat(szDir, MAX_PATH, TEXT("\\*")); // Find the first file in the directory. hFind = FindFirstFile(szDir, &ffd); if (INVALID_HANDLE_VALUE == hFind) { DisplayErrorBox(TEXT("FindFirstFile")); return dwError; } // List all the files in the directory with some info about them. do { if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { _tprintf(TEXT(" %s <DIR>\n"), ffd.cFileName); } else { filesize.LowPart = ffd.nFileSizeLow; filesize.HighPart = ffd.nFileSizeHigh; _tprintf(TEXT(" %s %ld bytes\n"), ffd.cFileName, filesize.QuadPart); } } while (FindNextFile(hFind, &ffd) != 0); dwError = GetLastError(); if (dwError != ERROR_NO_MORE_FILES) { DisplayErrorBox(TEXT("FindFirstFile")); } FindClose(hFind); return dwError;}void DisplayErrorBox(LPTSTR lpszFunction) { // Retrieve the system error message for the last-error code LPVOID lpMsgBuf; LPVOID lpDisplayBuf; DWORD dw = GetLastError(); FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpMsgBuf, 0, NULL ); // Display the error message and clean up lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT, (lstrlen((LPCTSTR)lpMsgBuf)+lstrlen((LPCTSTR)lpszFunction)+40)*sizeof(TCHAR)); StringCchPrintf((LPTSTR)lpDisplayBuf, LocalSize(lpDisplayBuf) / sizeof(TCHAR), TEXT("%s failed with error %d: %s"), lpszFunction, dw, lpMsgBuf); MessageBox(NULL, (LPCTSTR)lpDisplayBuf, TEXT("Error"), MB_OK); LocalFree(lpMsgBuf); LocalFree(lpDisplayBuf);}
