new file mode 100644
--- /dev/null
+++ b/examples/myfunc.c
@@ -0,0 +1,12 @@
+#include "mex.h"
+
+void
+mexFunction (int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
+{
+  const char *nm;
+  nm = mexFunctionName ();
+  mexPrintf("You called function: %s\n", nm);
+  if (strcmp (nm, "myfunc") == 0)
+    mexPrintf("This is the principal function\n", nm);
+  return; 
+}