get process id

ULONG ProcessNameOffset = 0;

void GetProcessNameOffset ( void )
{
    PEPROCESS PeProcess = PsGetCurrentProcess ();

    ULONG Index;

    if ( !PeProcess )
    {
        DbgPrint ( "ERROR! GetProcessNameOffset failed! [#1]\n" );
        return;
    }

    for ( Index = 0; Index < PAGE_SIZE * 3; Index++ )
    {
        if ( !strncmp ( "System", (PCCHAR)PeProcess + Index, strlen ( "System" ) ) )
        {
            ProcessNameOffset = Index;

            DbgPrint ( "ProcessNameOffset = 0x%X\n", ProcessNameOffset );

            break;
        }
    }
}

HANDLE GetProcessId ( const char* Name )
{
    PEPROCESS PeProcess = PsGetCurrentProcess ();

    ULONG Index = 0;

    HANDLE ProcessId = (HANDLE)-1;

    NTSTATUS Status = STATUS_SUCCESS;

    PCHAR ProcessName = 0;

    if ( PeProcess != 0 )
    {
        for ( Index = 0 ; Index < PAGE_SIZE * 3; Index++ )
        {
            Status = PsLookupProcessByProcessId ( (HANDLE)Index, &PeProcess );

            if ( Status != STATUS_SUCCESS )
                continue;

            if ( PeProcess <= 0 )
                continue;

            ProcessName = (PCHAR)( (PUCHAR)PeProcess + ProcessNameOffset );

            if ( ProcessName )
            {
                if ( !strncmp ( Name, ProcessName, strlen ( Name ) ) )
                {
                    ProcessId = (HANDLE)Index;
                    break;
                }
            }
        }
    }

    return ProcessId;
}