Implementing a schematic digitizing tool
Config.esriaddinx
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<ESRI.Configuration xmlns="http://schemas.esri.com/Desktop/AddIns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Name>DigitToolCS</Name>
  <AddInID>{d6a45c7d-30ad-4b78-b986-4480afdff7dc}</AddInID>
  <Description>Digit schematic feature.</Description>
  <Version>1.0</Version>
  <Image>Images\DigitTool.png</Image>
  <Author>ESRI</Author>
  <Company>ESRI</Company>
  <Date>29/10/2009</Date>
  <Targets>
    <Target name="Desktop" version="10.0" />
  </Targets>
  <AddIn language="CLR" library="ESRI.ArcGIS.SchematicSamples.DigitToolCS.dll" namespace="DigitTool">
    <ArcMap>
      <Commands>
        <Tool id="DigitTool_DigitToolCS" class="DigitTool" message="Sample of schematic digit tool." caption="Digit Tool" tip="Digit Tool." category="Schematic Samples" image="Images\DigitTool.png" />
      </Commands>
      <DockableWindows>
        <DockableWindow id="DigitTool_DockableWindowCS" class="DigitDockableWindow+AddinImpl" caption="Schematic Digitize" image="Images\DigitWindow.png">
          <InitialPlacement height="597" width="333" state="pinned" position="left" />
        </DockableWindow>
      </DockableWindows>
    </ArcMap>
  </AddIn>
</ESRI.Configuration>