Move Cursor to Center of Screen?

I've set up the code so that on rightmouse down the cursor shows up and you can drag it. however, the cursor stays hidden at the point where i left it on right mouse up.

Is there a simple way to get the cursor to end up in the middle of the screen after rightmouseup()?



So far ive tried this:
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%centerpos = Canvas.getCenter();

Canvas.setCursorPos(%centerpos);
echo(%centerpos);

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aswell as replacing %centerpos with numerical values. The echo gives off the right numbers but the cursor does not return to those x/y coords.

Thanks