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var pointerheight = WW_getlayerheight(WW_pointerlayer);
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var localy = WW_getlayertop(WW_pointerlayer) + pointerheight;
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var localx = WW_getlayerleft(WW_pointerlayer);
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var messageheight = WW_getlayerheight(WW_pointermessageobject);
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var messagewidth = WW_getlayerwidth(WW_pointermessageobject);
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var windowwidth = WW_getwindowwidth();
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var windowheight = WW_getwindowheight();
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if( localx + messagewidth > windowwidth)
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localx = windowwidth - messagewidth;
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if( localy + messageheight > windowheight)
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localy = WW_getlayertop(WW_pointerlayer) - messageheight;
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This code, uses sizes of window, pointer and mouse over message to position latter so it always visible
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Initial choice is starting below bottom left corner of pointer
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If no room to right, the shift so ends at window right boundary
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If no room below pointer, place above it
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Window Width and Height
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