Microsoft.VisualStudio.R.Package.Interop.CommandTargetToOleShim.Exec C# (CSharp) Method

        public int Exec(ref Guid guidCommandGroup, uint commandID, uint commandExecOpt, IntPtr variantIn, IntPtr variantOut) {
            // Cache the variants, they'll be needed if the command chain
            // goes back into another IOleCommandTarget (see CommandTargetToOleShim)
            CommandResult result;

            try {
                if (_variantStacks != null)
                    _variantStacks.Push(variantIn, variantOut, false);

                object inputArg = TranslateInputArg(ref guidCommandGroup, commandID, variantIn);
                object outputArg = null;

                result = _commandTarget.Invoke(guidCommandGroup, (int)commandID, inputArg, ref outputArg);

                if (outputArg != null && variantOut != IntPtr.Zero) {
                    Marshal.GetNativeVariantForObject(outputArg, variantOut);
                }
            } catch (Exception) {
                // Some ICommandTarget object is throwing an exception, which will propagate out as a failed hr, which
                //   isn't particularly easy to track down. Put a bit of exception information in the activity log.
                //ActivityLog.LogInformation("R Tools", exc.ToString());

                //string logPath = ActivityLog.LogFilePath; // This actually flushes the activity log buffer

                throw;
            } finally {
                if (_variantStacks != null)
                    _variantStacks.Pop();
            }

            return OleCommand.MakeOleResult(result);
        }