1.3 Using the FLI to set the cursor position

A similar Windows function, SetCursorPos , can be used to set the cursor position. The SetCursorPos function takes two LONG s. The following code defines an interface function to call SetCursorPos .

(fli:define-foreign-function (set-cursor-position "SetCursorPos")

    ((x :long)

     (y :long))

  :result-type :boolean)

For example, the cursor position can now be set to be near the top left corner by simply using the following command:

For a more extravagant example, define and execute the following function:

(defun test-cursor ()

  (dotimes (x 10)

    (dotimes (d 300) 

      (let ((r (/ (+ d (* 300 x)) 10.0)))

           (set-cursor-position

              (+ 300 (floor (* r (cos (/ (* d pi) 150.0)))))

              (+ 300 (floor (* r (sin (/ (* d pi) 150.0)))))

           )))))

LispWorks Foreign Language Interface User Guide and Reference Manual - 7 Dec 2011