Adding a command to the Output Window's context menu

I've been trying for several hours to extend the context menu of the Output window in Visual Studio, so that clicking on it with the left mouse button would display an item linked to my custom command.

To help with this, I installed Command Explorer by Mads Kristensen, which allowed me to find the proper GUID and ID for the context menu. For the Output window context menu, I’m using the following:

<GuidSymbol name="DocumentWindowCommandSet" value="{C9DD4A59-47FB-11D2-83E7-00C04F9902C1}">
  <IDSymbol name="DocumentContextMenu" value="0x155"/>
</GuidSymbol>

Guid and ID I take from: CommandExplorer

I also found and reviewed these related questions:

• Extend Document Window Context Menu in Visual Studio
• Adding Visual Studio Commands (Buttons) to specific locations

However, none of them helped resolve my issue.

Here is the current version of my .vsct file:

<?xml version="1.0" encoding="utf-8"?>
<CommandTable xmlns="http://schemas.microsoft.com/VisualStudio/2005-10-18/CommandTable" xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <Extern href="stdidcmd.h"/>
  <Extern href="vsshlids.h"/>

  <Commands package="guidOutputMenuExtensionPackage">

    <Groups>
      <Group guid="guidOutputMenuExtensionPackageCmdSet" id="MyMenuGroup" priority="0x0600">
        <Parent guid="DocumentWindowCommandSet" id="DocumentContextMenu"/>
      </Group>
    </Groups>

    <Buttons>
      <Button guid="guidOutputMenuExtensionPackageCmdSet" id="Command1Id" priority="0x0100" type="Button">
        <Parent guid="guidOutputMenuExtensionPackageCmdSet" id="MyMenuGroup" />
        <Icon guid="guidImages" id="bmpPic1" />
        <Strings>
          <ButtonText>EXECUTE Command1</ButtonText>
        </Strings>
      </Button>
    </Buttons>

    <Bitmaps>
      <Bitmap guid="guidImages" href="Resources\Command1.png" usedList="bmpPic1"/>
    </Bitmaps>

  </Commands>

  <Symbols>
    <GuidSymbol name="guidOutputMenuExtensionPackage" value="{9b255e13-1ab1-4a41-9bf8-194e2af5e5cb}" />

    <GuidSymbol name="DocumentWindowCommandSet" value="{C9DD4A59-47FB-11D2-83E7-00C04F9902C1}">
      <IDSymbol name="DocumentContextMenu" value="0x155"/>
    </GuidSymbol>

    <GuidSymbol name="guidOutputMenuExtensionPackageCmdSet" value="{30af3ca6-21df-4c44-adc4-fbe04533b289}">
      <IDSymbol name="MyMenuGroup" value="0x1020" />
      <IDSymbol name="Command1Id" value="0x0100" />
    </GuidSymbol>

    <GuidSymbol name="guidImages" value="{a132bff6-58d4-4a7f-835f-b910a930003f}" >
      <IDSymbol name="bmpPic1" value="1" />
    </GuidSymbol>
  </Symbols>
</CommandTable>

ChatGPT suggests using IDM_VS_CTXT_OUTPUTWINDOW, but such an identifier does not exist in vsshlids.h