如何从进程名获得进程ID

#include <ntddk.h>
#include "ntifs.h"

HANDLE RetrivePID( char* ProcessName )
{
PEPROCESS PeProcess = NULL;
PLIST_ENTRY	pNextEntry, pListHead;
PeProcess = PsGetCurrentProcess();
if(!PeProcess)
{
DbgPrint( "[ALARM] -> Cannot find 'System' process!" );
return (HANDLE)-1;
}
if( IsListEmpty( &PeProcess->ActiveProcessLinks ) )
DbgPrint("[ALARM] -> No processes found!");
else
{
pListHead = &PeProcess->ActiveProcessLinks;
pNextEntry = pListHead->Flink;
while(pNextEntry != pListHead)
{
PeProcess = CONTAINING_RECORD( pNextEntry,EPROCESS,ActiveProcessLinks );
if(PeProcess->ActiveThreads)
if( !IsListEmpty( &PeProcess->ThreadListHead ) )
{
//if( _strnicmp( PeProcess->ImageFileName, ProcessName ,strlen(ProcessName) ) == 0 )
//	return PsGetProcessId( PeProcess );
DbgPrint("Process name: %s - PID:%d", PeProcess->ImageFileName, PeProcess->UniqueProcessId);
}
PeProcess = NULL;
pNextEntry = pNextEntry->Flink;
}
}
return (HANDLE)-1;
}

VOID Unload(IN PDRIVER_OBJECT DriverObject)
{
DbgPrint("Test Driver :: Unload");
}

NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject,IN PUNICODE_STRING RegistryPathName)
{
DbgPrint("Test Driver :: DriverEntry");

// Test function
RetrivePID("notepad.exe");
DriverObject->DriverUnload = Unload;
return STATUS_SUCCESS;
}