+    m_inputStream  = inputSstream;
+    m_errorStream  = errorStream;
+    m_outputStream = outputStream;
+}
+
+bool wxProcess::IsInputOpened() const
+{
+    return m_inputStream && m_inputStream->GetLastError() != wxSTREAM_EOF;
+}
+
+bool wxProcess::IsInputAvailable() const
+{
+    return m_inputStream && m_inputStream->CanRead();
+}
+
+bool wxProcess::IsErrorAvailable() const
+{
+    return m_errorStream && m_errorStream->CanRead();
+}
+
+#endif // wxUSE_STREAMS
+
+// ----------------------------------------------------------------------------
+// process killing
+// ----------------------------------------------------------------------------
+
+/* static */
+wxKillError wxProcess::Kill(int pid, wxSignal sig, int flags)
+{
+    wxKillError rc;
+    (void)wxKill(pid, sig, &rc, flags);
+
+    return rc;
+}
+
+/* static */
+bool wxProcess::Exists(int pid)
+{
+    switch ( Kill(pid, wxSIGNONE) )
+    {
+        case wxKILL_OK:
+        case wxKILL_ACCESS_DENIED:
+            return true;
+
+        default:
+        case wxKILL_ERROR:
+        case wxKILL_BAD_SIGNAL:
+            wxFAIL_MSG( _T("unexpected wxProcess::Kill() return code") );
+            // fall through
+
+        case wxKILL_NO_PROCESS:
+            return false;
+    }