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First of all i want to search excel.exe file of c or d than i want to open how it is possible in Lisp.
thanks
Try the following:
(defun open-xl-exe ( / xls ) (if (and (setq xls (vl-registry-read "HKEY_CLASSES_ROOT\\.xls")) (setq xls (vl-registry-read (strcat "HKEY_CLASSES_ROOT\\" xls "\\shell\\new\\command"))) ) (startapp xls) ) (princ) )