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terminal/doc/ConsoleCtrlEvent.md

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Console Control Events

Generation

conhost requests that user32 inject a thread into the attached console application. See ntuser's exitwin.c for CreateCtrlThread.

Timeouts

Sourced from ntuser's exitwin.c, user.h

Event Circumstances Timeout
CTRL_CLOSE_EVENT any system parameter SPI_GETHUNGAPPTIMEOUT, 5000ms
CTRL_LOGOFF_EVENT CONSOLE_QUICK_RESOLVE_FLAG[1] registry key CriticalAppShutdownTimeout or 500ms
CTRL_LOGOFF_EVENT none of the above system parameter SPI_GETWAITTOKILLTIMEOUT, 5000ms
CTRL_SHUTDOWN_EVENT service process system parameter SPI_GETWAITTOKILLSERVICETIMEOUT, 20000ms
CTRL_SHUTDOWN_EVENT CONSOLE_QUICK_RESOLVE_FLAG[1] registry key CriticalAppShutdownTimeout or 500ms
CTRL_SHUTDOWN_EVENT none of the above system parameter SPI_GETWAITTOKILLTIMEOUT, 5000ms
CTRL_C, CTRL_BREAK any no timeout

[1]: nobody sets CONSOLE_QUICK_RESOLVE_FLAG.