How to move file to a trash

#include <windows.h>
#include <tchar.h>
#include <assert.h>
#include <malloc.h>
#include "SHDeleteFile.h"
 
BOOL SHDeleteFile(LPCTSTR lpFile)
{
	size_t len = _tcslen(lpFile);
	if(!lpFile || lpFile[0]==0 || len <= 3)
		return FALSE;
 
	// only fullpath allowed
	do
	{
#ifndef UNICODE
		if (IsDBCSLeadByte((BYTE)lpFile[0]))
			return FALSE;
#endif
 
		if( lpFile[0]==_T('\\') && lpFile[1]==_T('\\') )
			break;
 
		if( lpFile[1] == _T(':') && lpFile[2]==_T('\\') )
			break;
 
		return FALSE;
	} while(false);
 
	LPTSTR p = (LPTSTR)_alloca( (len+2)*sizeof(TCHAR) );
	if(!p)
		return FALSE;
	_tcscpy(p, lpFile);
	p[len+1]=0;
 
	SHFILEOPSTRUCT sfo = {0};
	sfo.hwnd = NULL;
	sfo.wFunc = FO_DELETE;
	sfo.pFrom = p;
	sfo.pTo   = NULL;  // ignored
	sfo.fFlags = FOF_ALLOWUNDO;
 
	int ret = SHFileOperation(&sfo);
	return ret==0;
}