diff --git a/microstack/ILibProcessPipe.h b/microstack/ILibProcessPipe.h
index 5ab38ad..0e0a1d9 100644
--- a/microstack/ILibProcessPipe.h
+++ b/microstack/ILibProcessPipe.h
@@ -103,9 +103,13 @@ typedef enum ILibWaitHandle_ErrorStatus
 }ILibWaitHandle_ErrorStatus;
 
 typedef BOOL(*ILibProcessPipe_WaitHandle_Handler)(HANDLE event, ILibWaitHandle_ErrorStatus status, void* user);
+void ILibProcessPipe_WaitHandle_Remove(ILibProcessPipe_Manager mgr, HANDLE event);
+
+// These methods will dispatch the callback on the worker thread
 void ILibProcessPipe_WaitHandle_Add_WithNonZeroTimeout(ILibProcessPipe_Manager mgr, HANDLE event, int milliseconds, void *user, ILibProcessPipe_WaitHandle_Handler callback);
 #define ILibProcessPipe_WaitHandle_Add(processPipeManager, eventHandle, user, callback) ILibProcessPipe_WaitHandle_Add_WithNonZeroTimeout(processPipeManager, eventHandle, 0, user, callback)
-void ILibProcessPipe_WaitHandle_Remove(ILibProcessPipe_Manager mgr, HANDLE event);
+
+// These methods will use an APC to context switch to the calling thread when dispatching
 void ILibProcessPipe_WaitHandle_Add2_WithNonZeroTimeout(ILibProcessPipe_Manager mgr, HANDLE event, int milliseconds, void *user, ILibProcessPipe_WaitHandle_Handler callback);
 #define ILibProcessPipe_WaitHandle_Add2(processPipeManager, eventHandle, user, callback) ILibProcessPipe_WaitHandle_Add2_WithNonZeroTimeout(processPipeManager, eventHandle, 0, user, callback)