wxCoInitializer class added

include/wxex/comutils.h

@@ -0,0 +1,63 @@
+/*
+    Copyright 2016 Amebis
+
+    This file is part of wxExtend.
+
+    wxExtend is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    wxExtend is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with wxExtend. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "common.h"
+
+
+///
+/// Create an object of this class on stack to initialize/cleanup the COM automatically.
+///
+class ZRCOLA_API wxCoInitializer
+{
+public:
+    ///
+    /// Initialize the COM
+    ///
+    /// \param[in] dwCoInit  The concurrency model and initialization options for the thread to pass to \c CoInitializeEx
+    ///
+    wxCoInitializer(DWORD dwCoInit = COINIT_MULTITHREADED);
+
+    ///
+    /// Dtor clean up
+    ///
+    virtual ~wxCoInitializer();
+    
+    ///
+    /// Has the initialization been successful? (explicit test)
+    ///
+    /// \returns
+    /// - true if initialization succeeded
+    /// - false otherwise
+    ///
+    bool IsOk() const { return m_ok; }
+
+    ///
+    /// Has the initialization been successful? (implicit test)
+    ///
+    /// \returns
+    /// - true if initialization succeeded
+    /// - false otherwise
+    ///
+    operator bool() const { return m_ok; }
+
+private:
+    bool m_ok;
+};