PRB: GlobalUnlock() Can Cause Fatal Exit 0x02F0

ID: Q49838

The information in this article applies to:

Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1

SYMPTOMS

Under the debugging version of Windows, when an application calls the GlobalUnlock() API, a FatalExit 0x02F0 "GlobalUnlock: Object usage count underflow" error occurs.

CAUSE

The application called the GlobalUnlock() API more times that it called the GlobalLock() API. Under the retail version of Windows, the function returns the normal value 0 in these circumstances.

RESOLUTION

Match each GlobalLock() call with a GlobalUnlock() call.

Additional query words: 3.00 3.10 fatal exit 2F0 02F0 2F0h

Keywords : kb16bitonly
Version : WINDOWS:3.0,3.1
Platform : WINDOWS
Issue type :