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Asked: 2026-05-10T15:13:19+00:00

using C++Builder 2007, the FindFirstFile and FindNextFile functions doesn’t seem to be able to

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using C++Builder 2007, the FindFirstFile and FindNextFile functions doesn’t seem to be able to find some files on 64-bit versions of Vista and XP. My test application is 32-bit.

If I use them to iterate through the folder C:\Windows\System32\Drivers they only find a handful of files although there are 185 when I issue a dir command in a command prompt. Using the same example code lists all files fine on a 32-bit version of XP.

Here is a small example program:

int main(int argc, char* argv[]) {   HANDLE hFind;   WIN32_FIND_DATA FindData;   int ErrorCode;   bool cont = true;    cout << 'FindFirst/Next demo.' << endl << endl;    hFind = FindFirstFile('*.*', &FindData);   if(hFind == INVALID_HANDLE_VALUE)   {     ErrorCode = GetLastError();     if (ErrorCode == ERROR_FILE_NOT_FOUND)     {       cout << 'There are no files matching that path/mask\n' << endl;     }     else     {       cout << 'FindFirstFile() returned error code ' << ErrorCode << endl;     }     cont = false;   }   else   {     cout << FindData.cFileName << endl;   }    if (cont)   {     while (FindNextFile(hFind, &FindData))     {       cout << FindData.cFileName << endl;     }      ErrorCode = GetLastError();     if (ErrorCode == ERROR_NO_MORE_FILES)     {       cout << endl << 'All files logged.' << endl;     }     else     {       cout << 'FindNextFile() returned error code ' << ErrorCode << endl;     }      if (!FindClose(hFind))     {       ErrorCode = GetLastError();       cout << 'FindClose() returned error code ' << ErrorCode << endl;     }   }   return 0; }

Running it in the C:\Windows\System32\Drivers folder on 64-bit XP returns this:

C:\WINDOWS\system32\drivers>t:\Project1.exe FindFirst/Next demo.  . .. AsIO.sys ASUSHWIO.SYS hfile.txt raspti.zip stcp2v30.sys truecrypt.sys  All files logged.

A dir command on the same system returns this:

C:\WINDOWS\system32\drivers>dir/p  Volume in drive C has no label.  Volume Serial Number is E8E1-0F1E   Directory of C:\WINDOWS\system32\drivers  16-09-2008  23:12    <DIR>          . 16-09-2008  23:12    <DIR>          .. 17-02-2007  00:02            80.384 1394bus.sys 16-09-2008  23:12             9.453 a.txt 17-02-2007  00:02           322.560 acpi.sys 29-03-2006  14:00            18.432 acpiec.sys 24-03-2005  17:11           188.928 aec.sys 21-06-2008  15:07           291.840 afd.sys 29-03-2006  14:00            51.712 amdk8.sys 17-02-2007  00:03           111.104 arp1394.sys 08-05-2006  20:19             8.192 ASACPI.sys 29-03-2006  14:00            25.088 asyncmac.sys 17-02-2007  00:03           150.016 atapi.sys 17-02-2007  00:03           106.496 atmarpc.sys 29-03-2006  14:00            57.344 atmepvc.sys 17-02-2007  00:03            91.648 atmlane.sys 17-02-2007  00:03           569.856 atmuni.sys 24-03-2005  19:12             5.632 audstub.sys 29-03-2006  14:00             6.144 beep.sys Press any key to continue . . . etc.

I’m puzzled. What is the reason for this?

Brian

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1 Answer

  1. Is there redirection going on? See the remarks on Wow64DisableWow64FsRedirection http://msdn.microsoft.com/en-gb/library/aa365743.aspx

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