Requirements for Objects
.gif)
| Previous | Next |
Requirements for Objects
WPD classifies all objects by content type. An object of a specific type is expected to support a minimum list of properties and resources (and, for the device object, a set of commands). An object's type is described by its WPD_OBJECT_CONTENT_TYPE property; every object must support this property.
WPD defines the following content types (as GUID values). A vendor is free to create their own custom-content type by providing their own GUID.
Note General purpose applications will typically only handle one of the predefined types. Vendor applications can, of course, take full advantage of the available custom types.
To learn which properties and resources each must support, see the description page for each of the following object types.
| Content Type GUID | Description |
| WPD_CONTENT_TYPE_ALL | This content type is only valid to use in certain query methods to indicate that you are interested in all device types; you cannot create an object of this type.
If you are designing a custom object, it must support these properties, at minimum. |
| WPD_CONTENT_TYPE_APPOINTMENT | Object is an appointment in a calendar. |
| WPD_CONTENT_TYPE_AUDIO_ALBUM | Object is an audio album. |
| WPD_CONTENT_TYPE_AUDIO | Object is an audio file, such as a WMA or MP3 file. |
| WPD_CONTENT_TYPE_CALENDAR | Object is a calendar. |
| WPD_CONTENT_TYPE_CERTIFICATE | Object is a certificate. |
| WPD_CONTENT_TYPE_CONTACT | Object is personal contact data, such as a vCard file. |
| WPD_CONTENT_TYPE_CONTACT_GROUP | Object is a contact group. |
| WPD_CONTENT_TYPE_DOCUMENT | Object is a container for text, with or without formatting. Examples include Microsoft Word files and plain text files. |
| WPD_CONTENT_TYPE_EMAIL | Object is an e-mail. |
| WPD_CONTENT_TYPE_FOLDER | Object is a folder. |
| WPD_CONTENT_TYPE_FUNCTIONAL_OBJECT | Object is a functional object, representing device functionality. |
| WPD_CONTENT_TYPE_GENERIC_FILE | Object is a generic physical file. |
| WPD_CONTENT_TYPE_GENERIC_MESSAGE | Object is a generic message. |
| WPD_CONTENT_TYPE_IMAGE_ALBUM | Object is an image album. |
| WPD_CONTENT_TYPE_IMAGE | Object is a still image, such as a JPEG file. |
| WPD_CONTENT_TYPE_MEDIA_CAST | Object is a container that groups related content, just as a playlist groups music |
| WPD_CONTENT_TYPE_MEMO | Object is a text note. |
| WPD_CONTENT_TYPE_MIXED_CONTENT_ALBUM | Object is an album of mixed media objects—for example, audio, image, and video files. |
| WPD_CONTENT_TYPE_NETWORK_ASSOCIATION | Object that represents an association between a host and a device. |
| WPD_CONTENT_TYPE_PLAYLIST | Object is a playlist. |
| WPD_CONTENT_TYPE_PROGRAM | Object is an executable. |
| WPD_CONTENT_TYPE_SECTION | Object that represents a section of data that is contained in another object. |
| WPD_CONTENT_TYPE_TASK | Object is a task, such as an item in a to-do list. |
| WPD_CONTENT_TYPE_UNSPECIFIED | Object is a generic object. |
| WPD_CONTENT_TYPE_VIDEO_ALBUM | Object is a video album. |
| WPD_CONTENT_TYPE_VIDEO | Object is a video, such as a WMV or AVI file. |
| WPD_CONTENT_TYPE_WIRELESS_PROFILE | Object that represents information used to access a wireless network. |
See Also
| Previous | Next |