the clipping looks like it worked, my geometry was just off :)
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				@ -5,14 +5,18 @@ hdc = upiwin.DevCtxt(type='screen')
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hdc.text_color = 0xFFFFFF  # white
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					hdc.text_color = 0xFFFFFF  # white
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hdc.rectangle(100, 100, 199, 199)
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					hdc.rectangle(100, 100, 199, 199)
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#clip = hdc.get_clip_rect()
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					clip = hdc.get_clip_rect()
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#hdc.set_clip_rect(100, 100, 200, 200)
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					hdc.set_clip_rect(100, 100, 200, 200)
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hdc.text_color = 0xFF0000  # red
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					hdc.text_color = 0x0000FF  # red
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hdc.move_to(0, 200)
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					hdc.move_to(50, 199)
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hdc.line_to(200, 0)
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					hdc.line_to(199, 50)
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#hdc.set_clip_rect(clip[0], clip[1], clip[2], clip[3])
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					hdc.text_color = 0x00FF00  # green
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					hdc.move_to(250, 199)
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					hdc.line_to(100, 50)
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					hdc.set_clip_rect(clip[0], clip[1], clip[2], clip[3])
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msg = {}
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					msg = {}
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while upiwin.get_message(msg):
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					while upiwin.get_message(msg):
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