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ADO 2.5 Connections in Visual C++ 6

Posted on 2000-03-14
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Last Modified: 2013-11-20
I've instaled ADO 2.5 in a Win 98  machine.

All works ok form VB and VBA, but i can't get it to work in Visual C++.

I'm using a _ConnectionPtr variable but create instance allways fails.

the follwing code allways fails

_ConnectionPtr mConn;

hr = mConn.CreateInstance ("ADODB.Connection");
 if(FAILED(hr))
 {
   mConn = NULL;
   return FALSE;
 }

also i've tried to replace "ADODB.Connection" (wich should be ok, cos i can create the object using a simple CreateObject in VB) by
__uuidof(_Connection)
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Question by:PedroG
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6 Comments
 
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by:Wyn
ID: 2615218
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by:Wyn
ID: 2615223
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Expert Comment

by:Wyn
ID: 2615229
Check above and I think it will clear all problems and you will gain more details...

Regards
W.Yinan
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Author Comment

by:PedroG
ID: 2615344
Guys i do not need to be tought how to work with ADO. I only can't creat a ConnectionPtr object!!!

AND BELEIVE ME THAT I'VE TRIED ALL THE WAYS THAT ARE IN THE MSDN
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Accepted Solution

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Tommy Hui earned 200 total points
ID: 2616523
What is the value of hr? You probably forgot to call CoInitializeEx().
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by:PedroG
ID: 2618825
Yes that is write, i've founded that out yesterday
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