GenerateConsoleCtrlEvent

The GenerateConsoleCtrlEvent function sends a specified signal to a console process group that shares the console associated with the calling process.

BOOL GenerateConsoleCtrlEvent(

DWORD dwCtrlEvent,	// signal to generate
DWORD dwProcessGroupId	// process group to get signal
);

Parameters

dwCtrlEvent

Specifies the type of signal to generate. One of the following values is specified:

Value	Meaning
CTRL_C_EVENT	Generates a CTRL+C signal.
CTRL_BREAK_EVENT	Generates a CTRL+BREAK signal.

dwProcessGroupId

Specifies the identifier of the process group that receives the signal. A process group is created when the CREATE_NEW_PROCESS_GROUP flag is specified in a call to the CreateProcess function. The process identifier of the new process is also the process group identifier of a new process group. The process group includes all processes that are descendants of the root process. Only those processes in the group that share the same console as the calling process receive the signal. In other words, if a process in the group creates a new console, that process does not receive the signal, nor do its descendants.

If this parameter is zero, the signal is generated in all processes that share the console of the calling process.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

GenerateConsoleCtrlEvent causes the control handler functions of processes in the target group to be called. All console processes have a default handler function that calls the ExitProcess function. A console process can use the SetConsoleCtrlHandler function to install or remove other handler functions.

SetConsoleCtrlHandler can also enable an inheritable attribute that causes the calling process to ignore CTRL+C signals. If GenerateConsoleCtrlEvent sends a CTRL+C signal to a process for which this attribute is enabled, the handler functions for that process are not called. CTRL+BREAK signals always cause the handler functions to be called.

See Also

CreateProcess, ExitProcess, SetConsoleCtrlHandler

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