SnmpExtensionInit - Win32 Programmer's Reference

Win32 Programmer's Reference

Home Index About

Custom Search

Overview

Group

Quick Info

Windows NT
Yes
Win95
No
Win32s
No
Import Library
user-defined
Header File
-
Unicode
No
Platform Notes
None

SnmpExtensionInit

The extensible agent calls the SnmpExtensionInit function in the extension agent DLL to perform bilateral initialization of both the extension and the extensible agents.

BOOL SnmpExtensionInit(

DWORD dwTimeZeroReference,
HANDLE *hPollForTrapEvent,
AsnObjectIdentifier *supportedView
);

Parameters
dwTimeZeroReference

[in] Specifies a time-zero reference for the extension agent.

hPollForTrapEvent

[out] Points to an event handle that will indicate that there are traps available when the extensible agent polls the SnmpExtensionTrap function entry point.

supportedView

[out] Points to an object identifier variable structure that specifies the MIB subtree that the extension agent supports.

Return Values
If the function succeeds, the return value is TRUE.

If the function fails, the return value is FALSE.

Remarks
The dwTimeZeroReference parameter allows all extension agents to report time information from the same reference point. The extension agent can compute elapsed time by subtracting dwTimeZeroReference from the value returned by the GetCurrentTime function. This time reference is necessary to implement traps and initiate some MIB variables.

An extension agent notifies the extensible agent that it needs to send a trap by setting the state of the hPollForTrapEvent parameter that is passed back during the SnmpExtensionInit entry point to signaled. Once this event has been set to the signaled state, the extensible agent repeatedly calls the extension agent's SnmpExtensionTrap entry point until it returns a value of FALSE. This indicates that the extension agent has no more traps to send. An extension agent application typically creates the hPollForTrapEvent event handle with the CreateEvent function during initialization. It typically sets hPollForTrapEvent to the signaled state with the SetEvent function.

If the extension agent does not generate traps, the hPollForTrapEvent parameter should return a value of NULL.

See Also
SnmpExtensionTrap, GetCurrentTime, CreateEvent, SetEvent

Last news from Greatis Software

    Nostalgia .Net     .Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More »

Recommended software for developers

    Ultimate Pack     Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More »

    Form Designer .Net     Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More »

    Print Suite .Net     Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More »

    Gradient Controls .Net     Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More »

    Greatis iGrid     iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More »

All the contacts and projects

Dmitry Vasiliev (just.dmitry)

More Online Helps

Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages

greatis just4fun network