diff --git a/CmdWindow.py b/CmdWindow.py
index ebc083d..afb35a4 100644
--- a/CmdWindow.py
+++ b/CmdWindow.py
@@ -4,8 +4,9 @@ import gobject
 from datetime import datetime
 
 class CmdWindow:
-    def __init__(self, status = '', starttime = None):
-        self.starttime = starttime
+    def __init__(self, handle_activated):
+        self.starttime = None
+        self.handle_activated = handle_activated
 
         self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
         self.window.set_geometry_hints(min_width = 350);
@@ -16,29 +17,35 @@ class CmdWindow:
         self.button = gtk.Button(stock = gtk.STOCK_OK)
         self.button.connect("clicked", self.activate_event)
 
+        self.status_hbox = gtk.HBox()
+        self.status_label = gtk.Label('')
+        self.elapsed_label = gtk.Label('')
+        self.status_hbox.pack_start(self.status_label, expand = False)
+        self.status_hbox.pack_end(self.elapsed_label, expand = False)
+
+        self.error_label = gtk.Label('')
+
+        self.formatted_label = gtk.Label('')
+
         vbox = gtk.VBox()
-        if status != '':
-            hbox = gtk.HBox()
-            lbl = gtk.Label(status)
-            hbox.pack_start(lbl, expand = False)
-            if starttime is not None:
-                self.elapsedlabel = gtk.Label(self.getElapsed())
-                gobject.timeout_add(1000, self.updateElapsed)
-                hbox.pack_end(self.elapsedlabel, expand = False)
-            vbox.pack_start(hbox)
+        vbox.pack_start(self.status_hbox)
+        vbox.pack_start(self.error_label)
+        vbox.pack_start(self.formatted_label)
+        gobject.timeout_add(1000, self.updateElapsed)
 
         hbox = gtk.HBox()
         hbox.pack_start(self.entry)
         hbox.pack_start(self.button, expand = False)
+        hbox.show_all()
         vbox.pack_start(hbox)
 
+        vbox.show()
+
         self.window.add(vbox)
-        self.window.show_all()
 
     def main(self):
-        self.text = ''
+        self.window.show()
         gtk.main()
-        return self.text
 
     def delete_event(self, widget, event, data=None):
         return False
@@ -47,10 +54,12 @@ class CmdWindow:
         gtk.main_quit()
 
     def activate_event(self, widget, data=None):
-        self.text = self.entry.get_text()
-        self.window.destroy()
+        if not self.handle_activated(self.entry.get_text(), self):
+            self.window.destroy()
 
     def getElapsed(self):
+        if self.starttime is None:
+            return ''
         delta = datetime.now() - self.starttime
         days = delta.days
         dsecs = delta.seconds
@@ -60,11 +69,34 @@ class CmdWindow:
         dsecs -= minutes * 60
         seconds = dsecs
         elapsed = ''
-        if days > 0:
+        if days != 0:
             elapsed = '%dd ' % days
         elapsed += '%d:%02d:%02d' % (hours, minutes, seconds)
         return elapsed
 
     def updateElapsed(self):
-        self.elapsedlabel.set_text(self.getElapsed())
+        self.elapsed_label.set_text(self.getElapsed())
         return True
+
+    def setStatus(self, status, starttime):
+        if status != '':
+            self.status_label.set_text(status)
+            self.starttime = starttime
+            self.updateElapsed()
+            self.status_hbox.show_all()
+        else:
+            self.status_hbox.hide_all()
+
+    def setError(self, error):
+        self.error_label.set_text(error)
+        if error != '':
+            self.error_label.show()
+        else:
+            self.error_label.hide()
+
+    def setFormatted(self, formatted):
+        self.formatted_label.set_text(formatted)
+        if formatted != '':
+            self.formatted_label.show()
+        else:
+            self.formatted_label.hide()
diff --git a/dwtt b/dwtt
index cd583b5..099614d 100755
--- a/dwtt
+++ b/dwtt
@@ -38,24 +38,35 @@ def main(argv):
 
     ds = DataStore(timedbfile)
 
-    while True:
-        status = ''
-        starttime = None
+    def handleActivated(cmdline, cw):
+        if cmdline.strip() == '':
+            return False
         ct = ds.getCurrentTask()
         if ct is not None:
             task = ds.getTaskByID(ct.taskid)
             status = 'Task: ' + ds.getTaskPath(task)
             if task.longname != '':
                 status += ' (%s)' % task.longname
-            starttime = ct.time
-        cw = CmdWindow(status, starttime)
-        cmdline = cw.main()
-        if cmdline.strip() == '':
-            break
+            cw.setStatus(status, ct.time)
+        else:
+            cw.setStatus('', None)
         cmd = Command(cmdline)
         res = processCommand(cmd, ds)
         if not res.keepwindow:
-            break
+            return False
+        cw.setError(res.error)
+        cw.setFormatted(res.formatted)
+        return True
+
+    cw = CmdWindow(handleActivated)
+    ct = ds.getCurrentTask()
+    if ct is not None:
+        task = ds.getTaskByID(ct.taskid)
+        status = 'Task: ' + ds.getTaskPath(task)
+        if task.longname != '':
+            status += ' (%s)' % task.longname
+        cw.setStatus(status, ct.time)
+    cw.main()
 
 class Result:
     def __init__(self):