AttachProcess

***********************************************
Attach the debugger to a running process
    pid - PID of the process to attach to. If NO_PROCESS, a dialog box
          will interactively ask the user for the process to attach to.
    event_id - reverved, must be -1
returns:
        -2 - impossible to find a compatible process
        -1 - impossible to attach to the given process (process died,
             privilege needed, not supported by the debugger plugin, ...)
         0 - the user cancelled the attaching to the process
         1 - the debugger properly attached to the process
See the important note to the StepInto() function

long AttachProcess(long pid, long event_id);