PRB: Fatal Exit Code 0x0019 Definition and Causes

The information in this article applies to:

• Microsoft Windows Software Development Kit (SDK) for Windows versions 3.0 and 3.1

SYMPTOMS

After an implicitly loaded dynamic-link library (DLL) attempts to create a window in its initialization procedure, a Fatal Exit 0x0019 occurs.

CAUSE

When an application is loaded, Windows loads any DLLs that are implicitly referenced by that application prior to initializing the application's task. Part of task initialization is creating a message queue for that application. By the time the application's WinMain() function is called, the message queue has been created.

Any window created by a DLL uses the message queue of the application task using that DLL. If an implicitly loaded DLL creates a window in its initialization code (that is, LibMain) there is no message queue for it to use. When Windows detects this situation, it signals Fatal Exit 0x0019.

RESOLUTION

If the DLL must display a message during initialization, it must either be explicitly loaded from the application using LoadLibrary() or the DLL should export a function that can be called from the WinMain() procedure of the application. By the time WinMain() is executed, the window queue has been created.

MORE INFORMATION

In Microsoft Windows, a network driver is the only DLL that can create a window during initialization. The network driver is loaded after the first application task has been initialized (that is, the shell), and any dialog box displayed by a network driver uses the message queue of the shell application.