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´´½¨ACCESSÎļþµ÷ÓÃOLEFUNCTIONʱ²úÉú´íÎó£¬ÔÚÏßÇóÖú

ÎÒÔÚCBÁ·´´½¨ACCESSÎļþ£¬
²ÉÓõÄÏÂÁдúÂë,ÎÒרÃÅÏÈ×ö¸öС³ÌÐò²âÊÔ£¬Ò»ÇÐÕý³£¡£
È»ºóÔÚ¼ÓÔص½1¸öÈí¼þÖУ¬
´«ÈëµÄ±äÁ¿MDB_PathNameÒ²ÊÇÕýÈ·µÄ¡£
µ«ÔÚÖ´ÐÐ
  mdb.OleFunction("Create",DataSource);
³ö´í!

Project app.exe raised exception class EAccessViolation with message
'Access violation at address 0055da57 . Read of address 00000800'

C/C++ code:

bool CreateAccess(AnsiString MDB_PathName)
{
/*
´´½¨Ö¸¶¨Ãû³ÆµÄmdbÊý¾Ý¿â£¬³É¹¦·µ»Øtrue
MDB_PathNameΪmdbÎļþËùÔڵķ¾¶ºÍÎļþÃû
ÓÉÓÚҪʹÓÃVariantÐͱäÁ¿£¬Òò´ËÒª#include <ComObj.hpp>
*/
bool seccess = false;
if(FileExists(MDB_PathName))//Èç¹ûMDBÎļþÒÑ´æÔÚ£¬Ôòɾ³ý£¬·ñÔò»á³ö´í
{
if(MessageBox(0, AnsiString(MDB_PathName+"ÒÑ´æÔÚ,È·¶¨É¾³ýÎļþ¼ÌÐø,È¡ÏûÍ˳ö").c_str()
,"ɾ³ýÒÑ´æÔÚÎļþ£¿"
, MB_OKCANCEL + MB_ICONQUESTION + MB_DEFBUTTON2) == IDCANCEL)
return false;

DeleteFile(MDB_PathName);
}

WideString DataSource="Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + MDB_PathName;

try
{
Variant mdb = CreateOleObject("ADOX.Catalog");

try
{
mdb.OleFunction("Create",DataSource);

seccess = true;
}
__finally
{
mdb = Unassigned;
}
}
catch(...)


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¹ØÓÚAccess violation writing

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Unhandled exception at 0x035e1341 in cvPDM.exe: 0xC0000005: Access violation writing location 0x80517de0.
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