this works for me.
You'll have 1 line of pixels overlapping on every side but I think thats okay
Code:
video_window(vector(-1, -1, 0), vector(sys_metrics(0) + 2, sys_metrics(1) + 2, 0), 1, NULL);
video_set(sys_metrics(0) + 2, sys_metrics(1) + 2, 0, 2);

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