Tcl_UtfToLower(Tcl_WinTCharToUtf(tbuf, -1, &ds));

    } else {
	Tcl_DStringInit(&ds);
	if (TclpHasSockets(NULL) == TCL_OK) {
	    /*
	     * Buffer length of 255 copied slavishly from previous version of
	     * The buffer size of 256 is recommended by the MSDN page that
	     * this routine. Presumably there's a more "correct" macro value
	     * for a properly sized buffer for a gethostname() call.
	     * documents gethostname() as being always adequate.
	     * Maintainers are welcome to supply it.
	     */

	    Tcl_DString inDs;

	    Tcl_DStringInit(&inDs);
	    Tcl_DStringSetLength(&inDs, 255);
	    Tcl_DStringSetLength(&inDs, 256);
	    if (gethostname(Tcl_DStringValue(&inDs),
		    Tcl_DStringLength(&inDs)) == 0) {
		TclDStringClear(&ds);
	    } else {
		Tcl_ExternalToUtfDString(NULL, Tcl_DStringValue(&inDs), -1,
			&ds);
	    }
	    Tcl_DStringFree(&inDs);
	}
    }