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clipboard problem caused by UAC RRS feed

  • Question

  • I have a problem that only occurs on Vista with UAC enabled. My process is
    running under the Local System account and it is unable to get the full list
    of clipboard formats after it is notified of a change to the clipboard.

    For example, if I copy text from the address bar of IE7, my app checks the
    clipboard and would normally see 4 formats:
    CF_UNICODETEXT
    CF_LOCALE
    CF_TEXT
    CF_OEMTEXT

    But with the process running as LocalSystem, it only gets the first 2 of
    those. Copying text from a web page has problems, too. Copying text from the
    command prompt works fine, however. Turning off UAC fixes the problem.

    I tried impersonating the logged on user before calling
    EnumClipboardFormats() but that didn't help.

    Thanks for your help.
    Wednesday, December 23, 2009 7:16 AM