DOCERR: NFY_RIP Not Received in Windows 3.0

The information in this article applies to:

• Microsoft Windows Software Development Kit (SDK) for Windows version 3.0

SUMMARY

The documentation on page 652 of the Microsoft Windows version 3.1 Software Development Kit (SDK) "Programmer's Reference, Volume 2: Functions" manual about NFY_RIP notification being sent to a callback function registered by NotifyRegister function is incorrect. The NFY_RIP notification is not received in Windows version 3.0.

Note, however, that the documentation in the Windows SDK online Help file (WIN31WH.HLP) corrects this error by stating that the NFY_RIP notification is received only under Windows version 3.1.

MORE INFORMATION

NotifyRegister() is an application programming interface (API) in the TOOLHELP.DLL shipped with Windows 3.1 that can be used by an application to obtain system notifications or information on system events. NotifyRegister() installs a notification callback procedure associated with a given task that is called by Windows on every system event. The callback function receives notification on system debugging errors (or system RIPs) only when the NF_RIP flag is set. Once the NFY_RIP notification is received, the callback could post a message passing the task handle or the notification ID to the main window, and let the main message processing take the appropriate action.

The documentation states that the callback function receives a NFY_RIP notification on every Fatal Exit message in Windows version 3.0 and later. This is not correct, because the callback function does not receive the NFY_RIP notification when a Fatal Exit message is generated while running under debug version of Windows 3.0. The NFY_RIP notification is received only under Windows version 3.1.