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Example Dictionary
The stock market data transfer example (see "Transferring Data Contained in
Property Sets," earlier in this appendix) might include a displayable name of
"Stock Quote" for the entire set, and "Ticker Symbol" for PID_SYMBOL. If a
property set contained just a symbol and the dictionary, the property set section
would have a byte stream that looked like the following:
Offset Bytes
; Start of section
0000 43 01 00 00 ; DWORD size of section
0004 03 00 00 00 ; DWORD number of properties in section
; Start of PropID/Offset pairs
0008 00 00 00 00 ; DWORD Property ID (0 == dictionary)
000C 20 00 00 00 ; DWORD offset to property ID
0010 01 00 00 00 ; DWORD Property ID (1 == code page)
0014 D0 00 00 00 ; DWORD offset to property ID
- 07 00 00 00 ; DWORD Property ID (i.e., PID_SYMBOL)
- C 34 01 00 00 ; DWORD offset to property ID
; Start of Property 0 (which is really the dictionary
0020 08 00 00 00 ; DWORD Number of entries in dictionary
; (Note: No type indicator)
0024 00 00 00 00 ; DWORD dwPropID = 0
- 18 00 00 00 ; DWORD cb = (wstrlen("Stock Quote")+1)
; * sizeof(WCHAR) == 24
002C L"Stock Quote\0" ; char sz[24]
0044 03 00 00 00 ; DWORD dwPropID = 3 (PID_SYMBOL)
0048 1C 00 00 00 ; DWORD cb = (wstrlen("Ticker Symbol") + 1
; * sizeof(WCHAR) == 28
004C L"Ticker Symbol\0" ; char sz[28]
; The dictionary would continue, but may not contain entries for
; every possible property. Also entries do not need to be in order
; (except dwPropID == 0 must be first).
; Start of Property 1 (code page indicator)
00D0 02 00 00 00 ; DWORD type indicator (VT_12)
00D4 B0 04 00 00 ; USHORT codepage (0x04B0 == 1200 == Unicode)
; Start of Property 7 (PID_SYMBOL)
0134 1E 00 00 00 ; DWORD type indicator (VT_LPWSTR == 1F)
0138 0A 00 00 00 ; DWORD count of bytes
013C L"MSFT\0" ; WCHAR sz[5] (incl 2 bytes for the NULL)
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