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PidTagRenderingPosition Canonical Property
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Contains an offset, in characters, to use in rendering an attachment within the main message text.
When the supplied offset is -1 (0xFFFFFFFF), the attachment is not rendered by using this property. All values other than -1 indicate the position within the PR_BODY (PidTagBody) property at which the attachment is to be rendered.
Note The character indicated by this property in PR_BODY is replaced by the attachment. Typically this character is a space, although a special placeholder character can also be used.
This property is expressed in characters. In some character sets this is not equivalent to bytes. Unicode applications can compute the position based on two-byte characters. Double-Byte Character Set (DBCS) applications must scan the text up to this property value, because their character representation varies between one and two bytes per character.
This property should not be used with Rich Text Format (RTF) text. The rendering position is indicated in RTF by an escape sequence called the object attachment placeholder. This sequence consists of the string \objattph followed by a single character, normally a space, that will be replaced by the attachment rendering.