diff --git a/whiptcl.c b/whiptcl.c
index 8688780..7219911 100644
--- a/whiptcl.c
+++ b/whiptcl.c
@@ -137,45 +137,45 @@ static int wtCmd(ClientData clientData, Tcl_Interp * interp, int argc,
     
     if (arg < -1) {
 	/* this could buffer oveflow, bug we're not setuid so I don't care */
-	interp->result = malloc(200);
-	interp->freeProc = TCL_DYNAMIC;
-	sprintf(interp->result, "%s: %s\n", 
+	char *tmp = malloc(200);
+	sprintf(tmp, "%s: %s\n", 
 		poptBadOption(optCon, POPT_BADOPTION_NOALIAS), 
 		poptStrerror(arg));
+	Tcl_SetResult(interp, tmp, TCL_DYNAMIC);
 
 	return TCL_ERROR;
     }
 
     if (mode == MODE_NONE) {
-	interp->result = "no dialog mode was specified";
+    	Tcl_SetResultString(interp, "no dialog mode was specified");
 	return TCL_ERROR;
     } else if (rc) {
-	interp->result = "multiple modes were specified";
+	Tcl_SetResultString(interp, "multiple modes were specified");
 	return TCL_ERROR;
     }
 
     if (!(text = poptGetArg(optCon))) {
-	interp->result = "missing text parameter";
+	Tcl_SetResultString(interp, "missing text parameter");
 	return TCL_ERROR;
     }
 
     if (!(nextArg = poptGetArg(optCon))) {
-	interp->result = "height missing";
+	Tcl_SetResultString(interp, "height missing");
 	return TCL_ERROR;
     }
     height = strtoul(nextArg, &end, 10);
     if (*end) {
-	interp->result = "height is not a number";
+	Tcl_SetResultString(interp, "height is not a number");
 	return TCL_ERROR;
     }
 
     if (!(nextArg = poptGetArg(optCon))) {
-	interp->result = "width missing";
+	Tcl_SetResultString(interp, "width missing");
 	return TCL_ERROR;
     }
     width = strtoul(nextArg, &end, 10);
     if (*end) {
-	interp->result = "width is not a number";
+	Tcl_SetResultString(interp, "width is not a number");
 	return TCL_ERROR;
     }
 
@@ -196,33 +196,30 @@ static int wtCmd(ClientData clientData, Tcl_Interp * interp, int argc,
       case MODE_YESNO:
 	rc = messageBox(text, height, width, MSGBOX_YESNO, flags);
 	if (rc == DLG_OKAY)
-	    interp->result = "yes";
+	    Tcl_SetResultString(interp, "yes");
 	else 
-	    interp->result = "no";
+	    Tcl_SetResultString(interp, "no");
 	if (rc == DLG_ERROR) rc = 0;
 	break;
 
       case MODE_INPUTBOX:
 	rc = inputBox(text, height, width, optCon, flags, &result);
 	if (rc ==DLG_OKAY) {
-	    interp->result = result;
-	    interp->freeProc = TCL_DYNAMIC;
+	    Tcl_SetResult(interp, result, TCL_DYNAMIC);
 	}
 	break;
 
       case MODE_MENU:
 	rc = listBox(text, height, width, optCon, flags, default_item, &result);
 	if (rc==DLG_OKAY) {
-	    interp->result = result;
-	    interp->freeProc = TCL_DYNAMIC;
+	    Tcl_SetResult(interp, result, TCL_DYNAMIC);
 	}
 	break;
 
       case MODE_RADIOLIST:
 	rc = checkList(text, height, width, optCon, 1, flags, &selections);
 	if (rc==DLG_OKAY) {
-	    interp->result = selections[0];
-	    interp->freeProc = TCL_DYNAMIC;
+	    Tcl_SetResult(interp, selections[0], TCL_DYNAMIC);
 
 	    free(selections);
 	}
@@ -247,7 +244,7 @@ static int wtCmd(ClientData clientData, Tcl_Interp * interp, int argc,
     newtPopWindow();
 
     if (rc == DLG_ERROR) {
-	interp->result = "bad paramter for whiptcl dialog box";
+	Tcl_SetResultString(interp, "bad paramter for whiptcl dialog box");
 	return TCL_ERROR;
     }