public static extern bool FindActCtxSectionGuid(uint dwFlags, IntPtr lpExtensionGuid, uint ulSectionId, [In] IntPtr lpGuidToFind, [Out] out tagACTCTX_SECTION_KEYED_DATA ReturnedData);
public static extern bool FindActCtxSectionStringA(uint dwFlags, IntPtr lpExtensionGuid, uint ulSectionId, [In][MarshalAs(UnmanagedType.LPStr)] string lpStringToFind, [Out] out tagACTCTX_SECTION_KEYED_DATA ReturnedData);