microsoft / microsoft/mfcmapi

Access Violation when Editing a PT_CLSID Property

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@stephenegriffin is already working on this.

Since May 29, 2025.

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Description

Access Violation when Editing a PT_CLSID Property

Reproduction Steps:

  1. Open an IMessage object.
  2. Add a named property of type PT_CLSID.
  3. Save the message.
  4. Edit the same property by assigning a random GUID.
  5. Result: Access Violation occurs (see attached screenshot).

Image

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