Getting process name winapi - winapi

Question

I have the problem , I can't get names of every process, some process show normal name but another return . How can I get the name of such process ? But the id is ok.
May I did something wrond , I am testing this on Windows 8.1
Here is the code .
DWORD aProcesses[1024], cbNeeded, cProcesses;
unsigned int i;
//This returns a list of handles to processes running on the system as an array.
if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) ) {
return 0;
}
// Calculate how many process identifiers were returned.
cProcesses = cbNeeded / sizeof(DWORD);
// Display the name and process identifier for each process.
for ( i = 0; i < cProcesses; i++ ) {
if( aProcesses[i] != 0 ) {
DisplayProcessNameAndID( aProcesses[i] );
}
}
void DisplayProcessNameAndID( DWORD processID )
{
TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>");
// Get a handle to the process.
HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, processID );
// Get the process name.
if (NULL != hProcess )
{
HMODULE hMod;
DWORD cbNeeded;
//Given a handle to a process, this returns all the modules running within the process.
//The first module is the executable running the process,
//and subsequent handles describe DLLs loaded into the process.
if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &cbNeeded) )
{
//This function returns the short name for a module,
//typically the file name portion of the EXE or DLL
GetModuleBaseName( hProcess, hMod, szProcessName,
sizeof(szProcessName)/sizeof(TCHAR) );
}
}
// Display the process name and identifier.
char buffer[400];
sprintf_s(buffer,"Text:%s, PID : %u", szProcessName, processID );
MessageBox(mainWinH,buffer, "Ok", MB_OK);
//close the process handle
CloseHandle( hProcess );
}