ableos/sysdata/libraries/horizon_api/src/lib.hb

stn := @use("../../stn/src/lib.hb");
.{string, memory, buffer} := stn

input := @use("../../intouch/src/lib.hb")

widgets := @use("widgets.hb")

WindowID := struct {
	host_id: int,
	window_id: int,
}

VoidWindowID := WindowID.(0, 0)

create_window := fn(channel: int): WindowID {
	// get the horizon buffer
	// request a new window and provide the callback buffer
	// wait to recieve a message

	windowing_system_buffer := buffer.search("XHorizon\0")

	if windowing_system_buffer == 0 {
		return VoidWindowID
	} else {
		msg := "\{01}\0"
		msg_length := 2

		@as(void, @eca(3, windowing_system_buffer, msg, msg_length))
		return WindowID.(1, 0)
	}
}