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Create Instance Failed!

Hi, all
Could any boday tell me why I failed to create instance here in the
following code ?

Codes sample
--------------------------------------------------------------------
void CInsertDataTestDlg::OnBnClickedButton1()
{
_ConnectionPtr pMyConnect=NULL;
HRESULT hr=pMyConnect.CreateInstance(__uuidof(Connection)) ;
if(FAILED(hr))return ;
AfxMessageBox(_T("Successfull connected!"), MB_OK)
}
--------------------------------------------------------------------

Thanks in advance!

Joseph
Jul 20 '06 #1
3 5758
"Joseph Lu" <jo******@yahoo.comwrote in message
news:en**************@TK2MSFTNGP04.phx.gbl...
Could any boday tell me why I failed to create instance here in the
following code ?
...
--------------------------------------------------------------------
void CInsertDataTestDlg::OnBnClickedButton1()
{
_ConnectionPtr pMyConnect=NULL;
HRESULT hr=pMyConnect.CreateInstance(__uuidof(Connection)) ;
if(FAILED(hr))return ;
AfxMessageBox(_T("Successfull connected!"), MB_OK)
}
--------------------------------------------------------------------
Um, what is the value of hr?

Regards,
Will
Jul 20 '06 #2
the value of hr is : 0x800401f0 , my code is very simple, I used VC to
create a dialog based application and the create a new button on the dialog,
then I added a button click event to this app ,and I have listed the code as
my previous mail detailed .
"William DePalo [MVP VC++]" <wi***********@mvps.org写入消息
news:%2****************@TK2MSFTNGP05.phx.gbl...
"Joseph Lu" <jo******@yahoo.comwrote in message
news:en**************@TK2MSFTNGP04.phx.gbl...
> Could any boday tell me why I failed to create instance here in the
following code ?
...
--------------------------------------------------------------------
void CInsertDataTestDlg::OnBnClickedButton1()
{
_ConnectionPtr pMyConnect=NULL;
HRESULT hr=pMyConnect.CreateInstance(__uuidof(Connection)) ;
if(FAILED(hr))return ;
AfxMessageBox(_T("Successfull connected!"), MB_OK)
}
--------------------------------------------------------------------

Um, what is the value of hr?

Regards,
Will

Jul 20 '06 #3
Well , I got it, I find I need to call AfxOleInit() before create instance!

"Joseph Lu" <jo******@yahoo.com写入消息
news:ux**************@TK2MSFTNGP03.phx.gbl...
the value of hr is : 0x800401f0 , my code is very simple, I used VC to
create a dialog based application and the create a new button on the
dialog, then I added a button click event to this app ,and I have listed
the code as my previous mail detailed .
"William DePalo [MVP VC++]" <wi***********@mvps.org写入消息
news:%2****************@TK2MSFTNGP05.phx.gbl...
>"Joseph Lu" <jo******@yahoo.comwrote in message
news:en**************@TK2MSFTNGP04.phx.gbl...
>> Could any boday tell me why I failed to create instance here in the
following code ?
...
--------------------------------------------------------------------
void CInsertDataTestDlg::OnBnClickedButton1()
{
_ConnectionPtr pMyConnect=NULL;
HRESULT hr=pMyConnect.CreateInstance(__uuidof(Connection)) ;
if(FAILED(hr))return ;
AfxMessageBox(_T("Successfull connected!"), MB_OK)
}
--------------------------------------------------------------------

Um, what is the value of hr?

Regards,
Will


Jul 20 '06 #4

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