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VSConstants.VS_E_UNSUPPORTEDFORMAT Field

CreateEditorInstance returns this value if the document has a format that cannot be opened in the editor.

Namespace:  Microsoft.VisualStudio
Assembly:  Microsoft.VisualStudio.Shell.9.0 (in Microsoft.VisualStudio.Shell.9.0.dll)

public const int VS_E_UNSUPPORTEDFORMAT

When looping through CreateEditorInstance to find an appropriate editor to edit a file, if the file is currently open, returning VS_E_UNSUPPORTEDFORMAT will allow the loop to continue without closing the document.

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