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copied!<h1>Output Window</h1> <p>To write to the "General" output window in Visual Studio, you need to do the following:</p> <pre><code>IVsOutputWindow outWindow = Package.GetGlobalService( typeof( SVsOutputWindow ) ) as IVsOutputWindow; Guid generalPaneGuid = VSConstants.GUID_OutWindowGeneralPane; // P.S. There's also the GUID_OutWindowDebugPane available. IVsOutputWindowPane generalPane; outWindow.GetPane( ref generalPaneGuid , out generalPane ); generalPane.OutputString( "Hello World!" ); generalPane.Activate(); // Brings this pane into view </code></pre> <p>If, however, you want to write to a custom window, this is what you need to do:</p> <pre><code>IVsOutputWindow outWindow = Package.GetGlobalService( typeof( SVsOutputWindow ) ) as IVsOutputWindow; // Use e.g. Tools -> Create GUID to make a stable, but unique GUID for your pane. // Also, in a real project, this should probably be a static constant, and not a local variable Guid customGuid = new Guid("0F44E2D1-F5FA-4d2d-AB30-22BE8ECD9789"); string customTitle = "Custom Window Title"; outWindow.CreatePane( ref customGuid, customTitle, 1, 1 ); IVsOutputWindowPane customPane; outWindow.GetPane( ref customGuid, out customPane); customPane.OutputString( "Hello, Custom World!" ); customPane.Activate(); // Brings this pane into view </code></pre> <p>Details on <a href="http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.shell.interop.ivsoutputwindow.aspx" rel="noreferrer">IVsOutputWindow</a> and <a href="http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.shell.interop.ivsoutputwindowpane.aspx" rel="noreferrer">IVsOutputWindowPane</a> can be found on MSDN.</p> <h1>Error List</h1> <p>For adding items to the error list, the <code>IVsSingleFileGenerator</code> has a method call <code>void Generate(...)</code> which has a parameter of the type <code>IVsGeneratorProgress</code>. This interface has a method <code>void GeneratorError()</code> which lets you report errors and warnings to the Visual Studio error list.</p> <pre><code>public class MyCodeGenerator : IVsSingleFileGenerator { ... public void Generate( string inputFilePath, string inputFileContents, string defaultNamespace, out IntPtr outputFileContents, out int output, IVsGeneratorProgress generateProgress ) { ... generateProgress.GeneratorError( false, 0, "An error occured", 2, 4); ... } ... } </code></pre> <p>The details of <a href="http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.shell.interop.ivsgeneratorprogress.generatorerror.aspx" rel="noreferrer">GeneratorError()</a> can be found on MSDN.</p>

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