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Delete File

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Submitted on: 10/27/2019 8:47:14 AM
By: Philippe RIO  
Level: Intermediate
User Rating: Unrated
Compatibility: C
Views: 192
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     A simple file to show how to delete any files. I use DeleteFile which erase files without using the trash, use SHFILE_OPERATION for that. You can use NtDeleteFiles to erase any files even locked files.
 
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//**************************************
// Name: Delete File
// Description:A simple file to show how to delete any files.
I use DeleteFile which erase files without using the trash, use SHFILE_OPERATION for that.
You can use NtDeleteFiles to erase any files even locked files.
// By: Philippe RIO
//**************************************

File : Delete.c
-----------------------------
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <shlwapi.h>
#include <shlobj.h>
#include <Stringapiset.h>
HINSTANCE	hInstance ;
char	szPgmDirectory[MAX_PATH + 4] ;
char	szPgmFileName[MAX_PATH + 4] ;
char	szFinished[]	=	"Finished" ;
int		iNbFiles, iNbDirs ;
int Error(LPSTR __lpszText)
{
	MessageBox(NULL,__lpszText,"Error",MB_OK|MB_ICONEXCLAMATION) ;
	return (0) ;
}
int MainDelete(LPSTR __lpszDirectory)
{
				HANDLE			_hFind ;
				LPSTR			_lpszPath ;
	register	LPSTR			_lpszFile ;
	register	LPSTR			_lpszFoundFile ;
				char			_szFile[MAX_PATH + 4] ;
				char			_szPath[MAX_PATH + 4] ;
				WIN32_FIND_DATA	_Wf, *_lpWf ;
/*
	if(PathIsSystemFolder(__lpszDirectory,FILE_ATTRIBUTE_SYSTEM))
		return (Error("I refuse to delete a system Folder!")) ;
*/
	GetWindowsDirectory(_szPath,sizeof(_szPath)) ;
	if(lstrcmp(_szPath,__lpszDirectory) == 0)
		return (Error("I refuse to delete the \"Windows\" Folder!")) ;
	GetSystemDirectory(_szPath,sizeof(_szPath)) ;
	if(lstrcmp(_szPath,__lpszDirectory) == 0)
		return (Error("I refuse to delete the \"Windows' System\" Folder!")) ;
	_lpWf = (LPWIN32_FIND_DATA) memset(&_Wf,0,sizeof(WIN32_FIND_DATA)) ;
	_lpszFile = (LPSTR) memset(_szFile,0,sizeof(_szFile)) ;
	_lpszPath = (LPSTR) memset(_szPath,0,sizeof(_szPath)) ;
	_hFind = NULL ;
	lstrcat(__lpszDirectory,"\\") ;
	lstrcat(lstrcpy(_szPath,__lpszDirectory),"*.*") ;
	_lpszFoundFile = _lpWf->cFileName ;
	_hFind = FindFirstFile(_lpszPath,&_Wf) ;
	if(_hFind == INVALID_HANDLE_VALUE)
		return (0) ;			//	Nothing to delete
	do
	{
		if(*_lpszFoundFile != '.')
		{
			lstrcat(lstrcpy(_lpszFile,__lpszDirectory),_lpszFoundFile) ;
			if(_lpWf->dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY)
			{
				MainDelete(_lpszFile) ;
				if(RemoveDirectory(_lpszFile))
					iNbDirs++ ;
			}
			else
			{
				SetFileAttributes(_lpszFile,FILE_ATTRIBUTE_NORMAL) ;
				if(DeleteFile(_lpszFile))
					iNbFiles++ ;
			}
		}
	} while(FindNextFile(_hFind,_lpWf)) ;
	FindClose(_hFind) ;
	if(RemoveDirectory(__lpszDirectory))
		iNbDirs++ ;
	return (iNbFiles) ;
}
int PASCAL WinMain(HINSTANCE __hInstance, HINSTANCE __hPrevInstance, LPSTR __lpszCmdLine, int __nCmdShow)
{
	HANDLE			_hThread ;
	DWORD			_dwThreadId ;
	LPSTR			_lpszTmp, _lpszDirectory ;
	char			_szDirectory[MAX_PATH] ;
	char			_szTmp[1024] ;
	_lpszTmp = _szTmp ;
	_lpszDirectory = _szDirectory ;
hInstance = __hInstance;
	GetModuleFileName(hInstance,szPgmFileName,MAX_PATH) ;
	lstrcpy(szPgmDirectory,szPgmFileName) ;
	*(PathFindFileName(szPgmDirectory)) = '\0' ;
	PathRemoveBackslash(szPgmDirectory) ;
	GetModuleFileName(__hInstance,szPgmFileName,MAX_PATH) ;
	lstrcpy(szPgmDirectory,szPgmFileName) ;
	*(PathFindFileName(szPgmDirectory)) = '\0' ;
	PathRemoveBackslash(szPgmDirectory) ;
	iNbFiles = 0 ;
	GetCurrentDirectory(MAX_PATH,_lpszDirectory) ;
	if(PathIsNetworkPath(_lpszDirectory))
		return (Error("I don't want to delete anything on a network!")) ;
	if(PathIsRoot(_lpszDirectory))
		return (Error("I refuse to delete anything starting from a ROOT!")) ;
	if(PathIsDirectory(_lpszDirectory))
	{
		iNbFiles = 0 ;
		iNbDirs = 0 ;
		_hThread = CreateThread(NULL,1024 * 1024 * 4,(LPTHREAD_START_ROUTINE) MainDelete,_lpszDirectory,CREATE_SUSPENDED,&_dwThreadId) ;
		SetThreadPriority(_hThread,THREAD_MODE_BACKGROUND_BEGIN) ;
		ResumeThread(_hThread) ;
		WaitForSingleObject(_hThread,INFINITE) ;
		SetThreadPriority(_hThread,THREAD_MODE_BACKGROUND_END) ;
		CloseHandle(_hThread) ;
	}
/*
FOLDERID_History			{D9DC8A3B-B784-432E-A781-5A1130A75963}	CSIDL_HISTORY
FOLDERID_InternetCache		{352481E8-33BE-4251-BA85-6007CAEDCF9D}	CSIDL_INTERNET_CACHE
FOLDERID_CDBurning			{9E52AB10-F80D-49DF-ACB8-4330F5687855}	CSIDL_CDBURN_AREA
FOLDERID_Cookies			{2B0F765D-C0E9-4171-908E-08A611B84FF6}	CSIDL_COOKIES
FOLDERID_PrintHood			{9274BD8D-CFD1-41C3-B35E-B13F55A758F4}	CSIDL_PRINTHOOD
FOLDERID_Recent				{AE50C081-EBD2-438A-8655-8A092E34987A}	CSIDL_RECENT
	SHGetSpecialFolderPath(NULL,_lpszDirectory,CSIDL_HISTORY,TRUE) ;
	SHGetSpecialFolderPath(NULL,_lpszDirectory,CSIDL_INTERNET_CACHE,TRUE) ;
	SHGetSpecialFolderPath(NULL,_lpszDirectory,CSIDL_CDBURN_AREA,TRUE) ;
	SHGetSpecialFolderPath(NULL,_lpszDirectory,CSIDL_COOKIES,TRUE) ;
	SHGetSpecialFolderPath(NULL,_lpszDirectory,CSIDL_PRINTHOOD,TRUE) ;
	SHGetSpecialFolderPath(NULL,_lpszDirectory,CSIDL_RECENT,TRUE) ;
*/
	wsprintf(_szTmp,"Number of files deleted : %lu\nNumber of directories deleted : %lu",iNbFiles,iNbDirs) ;
	MessageBox(NULL,_szTmp,"Delete Files",MB_OK|MB_ICONEXCLAMATION) ;
return (0) ;
}
----------------------------------
Libraries used : 
kernel32.lib
user32.lib
gdi32.lib
comctl32.lib
comdlg32.lib
advapi32.lib
delayimp64.lib
shlwapi.lib
Shell32.lib
---------------------


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