| Calling a print API that makes network calls on a GUI thread |
Application Verifier break message
Calling a print API that makes network calls on a GUI thread.
Probable cause
A routine running on a graphical user interface (GUI) thread called a print API that makes network calls. This can lead to an unresponsive user interface.
Information displayed by Application Verifier
Parameter 1�-�HWND of the top-level visible window.
Parameter 2�-�Current thread ID.
Parameter 3�-�Not used.
Parameter 4�-�Not used.
Additional information
Stop code: A028
Print APIs that make network calls should be called on a worker thread that has no message pumps.