# Cannot access a disposed object If you get the error below when opening the VC++ MFC sample with Visual Studio 2017, the reason is that MFC is not installed by default with VS 2017. ![](https://support.soraco.co/hc/article_attachments/115017891823/mceclip1.png) To install MFC, make sure that the MFC component is selected when you install VS 2017. ![](https://support.soraco.co/hc/article_attachments/115017713406/mceclip2.png) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.soraco.co/docs/faq/cannot-access-a-disposed-object.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.