Issues #276, #1163 - introduce class IncomingParam

src/plugin/COM_Value.cpp

Index: src/plugin/COM_Value.cpp
===================================================================
--- a/src/plugin/COM_Value.cpp
+++ b/src/plugin/COM_Value.cpp
@@ -62,3 +62,27 @@
   }
   return std::wstring( bstr, SysStringLen( bstr ) );
 }
+
+
+namespace
+{
+  /**
+   * Pre-construction assistant for wstring_Incoming_Param.
+   *
+   * Because wstring_Incoming_Param is a derived class,
+   *   we need to have a wstring value to initialize the base class.
+   */
+  std::wstring construct_Incoming_Param( BSTR b )
+  {
+    if ( !b )
+    {
+      return std::wstring();
+    }
+    return std::wstring( b, SysStringLen( b ) );
+  }
+}
+
+Incoming_Param::Incoming_Param( BSTR b )
+  : std::wstring( construct_Incoming_Param( b ) )
+{
+}