代碼很簡(jiǎn)單就是操作EDB數(shù)據(jù)庫，先按開始時(shí)間降序排序，然后刪除第一條匹配的記錄。

?

?1?bool?DeleteLastCallLogByNumber(LPCTSTR?lpszNumber)
?2?{
?3?????typedef?enum
?4?????{
?5?????????CT_Reserved=0,
?6?????????CT_Outgoing=1,
?7?????????CT_Connected=2,
?8?????????CT_Ended=4,
?9?????????CT_Voice_Data=8,
10?????????CT_Roam=16
11?????}CallType;
12?
13?????DebugMsg(_T("DeleteLastCallLogByNumber?Enter"));
14?????bool?bRetn=false;
15?????CEGUID?ceguid;
16?????if(CeMountDBVolEx(&ceguid,?_T("\\pim.vol"),?NULL?,?OPEN_EXISTING))
17?????{
18?????????DebugMsg(_T("DeleteLastCallLogByNumber!CeMountDBVolEx?Pass"));
19?????????CEOID?ceoid=0;
20?????????SORTORDERSPECEX?pSort={CEOIDINFOEX_VERSION,1,0};
21?????????pSort.rgPropID[0]=0x20040;?//按StartTime排序
22?????????pSort.rgdwFlags[0]=CEDB_SORT_DESCENDING;
23?????????HANDLE?hndDb?=?CeOpenDatabaseInSession(NULL,&ceguid,&ceoid,_T("clog.db"),&pSort,CEDB_AUTOINCREMENT,NULL);
24?????????if(hndDb?!=?INVALID_HANDLE_VALUE)
25?????????{
26?????????????DebugMsg(_T("DeleteLastCallLogByNumber!CeOpenDatabaseInSession?Pass"));
27?????????????if(0!=CeSeekDatabase(hndDb,CEDB_SEEK_BEGINNING,0,NULL))
28?????????????{
29?????????????????DebugMsg(_T("DeleteLastCallLogByNumber!CeSeekDatabase?Pass"));
30?????????????????CEOID?ceOid;
31?????????????????WORD?propID=0;
32?????????????????PCEPROPVAL?lpBuffer=NULL;
33?????????????????DWORD?lpcbBuffer;
34?????????????????PCEPROPVAL?propVal;
35?????????????????while(0!=(ceOid=CeReadRecordProps(hndDb,CEDB_ALLOWREALLOC,&propID,NULL,(LPBYTE*)&lpBuffer,&lpcbBuffer)))
36?????????????????{
37?????????????????????int?CallType;
38?????????????????????LPWSTR?Number;
39?????????????????????for(int?i=0;i<propID;++i)
40?????????????????????{
41?????????????????????????propVal=lpBuffer+i;
42?????????????????????????switch(HIWORD(propVal->propid))
43?????????????????????????{
44?????????????????????????case?6:
45?????????????????????????????Number?=?propVal->val.lpwstr;
46?????????????????????????????break;
47?????????????????????????case?4:
48?????????????????????????????CallType?=?propVal->val.lVal;
49?????????????????????????????break;
50?????????????????????????}
51?????????????????????}
52?????????????????????
53?????????????????????if((CallType&CT_Outgoing)?&&?_tcscmp(Number,lpszNumber)==0)
54?????????????????????{
55?????????????????????????if(CeDeleteRecord(hndDb,ceOid))
56?????????????????????????{
57?????????????????????????????DebugMsg(_T("DeleteLastCallLogByNumber!CeDeleteRecord?Pass"));
58?????????????????????????????bRetn=true;
59?????????????????????????}
60?????????????????????????else
61?????????????????????????{
62?????????????????????????????DebugMsg(_T("DeleteLastCallLogByNumber!CeDeleteRecord?Fail"));
63?????????????????????????}
64?????????????????????????break;
65?????????????????????}
66?????????????????}
67?????????????????if(lpBuffer)LocalFree((LPBYTE)lpBuffer);
68?????????????}
69?????????????CloseHandle(hndDb);
70?????????}
71?????????CeFlushDBVol(&ceguid);
72?????????CeUnmountDBVol(&ceguid);
73?????}
74?????
75?????return?bRetn;
76?}

?

?

另附轉(zhuǎn)載的一篇pim.vol數(shù)據(jù)庫內(nèi)部信息的文章

以下是本人從pim.vol中讀取的數(shù)據(jù)庫信息，由此可以對(duì)數(shù)據(jù)庫有更深入的了解。
********************
12 databases found!
PIM.VOL GUID: 3306647807
********************
[0] Appointments Database
?

OID: 1077960704
??? Version: 2
??? 2 RECS,
??? Type: 25
??? Size: 0
??? Flags: 0x17
??? 5 sort orders:
??? ==========
??? Sort 0 has 1 props:
??? [wVersion ]=? 2
??? [wKeyFlags]=0x1200
??? ? PID[0]=0x10000066
??? ?? (Pr=0x1000,Ty=102)
??? ? PFL[0]=0x0
??? ==========
??? Sort 1 has 1 props:
??? [wVersion ]=? 2
??? [wKeyFlags]=0x0
??? ? PID[0]=0x10420040
??? ?? (Pr=0x1042,Ty=64)
??? ? PFL[0]=0x0
??? ==========
??? Sort 2 has 1 props:
??? [wVersion ]=? 2
??? [wKeyFlags]=0x0
??? ? PID[0]=0x22000b
??? ?? (Pr=0x22,Ty=11)
??? ? PFL[0]=0x0
??? ==========
??? Sort 3 has 1 props:
??? [wVersion ]=? 2
??? [wKeyFlags]=0x0
??? ? PID[0]=0x10400013
??? ?? (Pr=0x1040,Ty=19)
??? ? PFL[0]=0x0
??? ==========
??? Sort 4 has 1 props:
??? [wVersion ]=? 2
??? [wKeyFlags]=0x0
??? ? PID[0]=0x1b0013
??? ?? (Pr=0x1b,Ty=19)
??? ? PFL[0]=0x0
??? ==========
-------------------
[1] CategoryAssocDB
??? OID: 1078239245
??? Version: 2
??? 0 RECS,
??? Type: 83
??? Size: 0
??? Flags: 0x17
??? 2 sort orders:
??? ==========
??? Sort 0 has 2 props:
??? [wVersion ]=? 2
??? [wKeyFlags]=0x200
??? ? PID[0]=0x10013
??? ?? (Pr=0x1,Ty=19)
??? ? PFL[0]=0x0
??? ? PID[1]=0x20003
??? ?? (Pr=0x2,Ty=3)
??? ? PFL[1]=0x0
??? ==========
??? Sort 1 has 2 props:
??? [wVersion ]=? 2
??? [wKeyFlags]=0x200
??? ? PID[0]=0x20003
??? ?? (Pr=0x2,Ty=3)
??? ? PFL[0]=0x0
??? ? PID[1]=0x10013
??? ?? (Pr=0x1,Ty=19)
??

轉(zhuǎn)載于:https://www.cnblogs.com/mondol/archive/2010/03/24/1693844.html

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