Send an input event to the window that has input focus on a given display.
#include <screen/screen.h>
int screen_inject_event(screen_display_t disp, screen_event_t ev)
The display into which the event will be injected. You can obtain a handle to the display by either screen_get_context_property() or screen_get_window_property() functions.
An event handle that was created with screen_create_event(). This event must contain all the relevant event data pertaining to its type when injected into the system.
Function Type: Immediate Execution
A window manager and an input provider can use this function when they need to inject an event in the system. You need to be within a privileged context to be able to inject input events. You can create a privileged context by calling the function screen_create_context() with a context type of SCREEN_WINDOW_MANAGER_CONTEXT or SCREEN_INPUT_PROVIDER_CONTEXT. Prior to calling screen_inject_event(), you must have set all relevant event properties to valid values - especially the event type property. When using screen_inject_event(), the event will be sent to the window that has input focus on the specified display. If you want to send an event to a particular window other than the one who has input focus, then use screen_send_event().
0 if the event was sent to the window that has input focus on the display, or -1 if an error occurred (errno is set).