Problem with ADO.

[WilliamGS]

Hi all. I have an app (VC 6.00) that works with an Access database and ADO, this app has worked fine, but it has problems only in one PC. My code is:

CoInitialize(NULL);
_ConnectionPtr con(__uuidof(Connection));
con->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=dbTest.mdb"); //Here is the problem!!!!!
//...

'con->Open()' shows the error: "Null Pointer"
It seems that '_ConnectionPtr con(__uuidof(Connection))' did not work fine.

This happens only in one PC.
How can I solve this problem? Where is ADO installers for download?

Thanks in advance.

William GS

 

[jpetrenchik]

__uuidof(Connection) will return the UUID of the Connection object for the version of the ADO library that is on the computer you built the app on. (That imported by the #import statement you used)

Is is most likely that _uuidof(Connection) cannot be found on the machine you are having the problem with either because ADO objects are not installed, or the installed version is earlier that that used for your build.

To get current ADO

http://msdn.microsoft.com/data/Default.aspx

Another option is to use an earlier build of ADO on your development machine.

Probably numerous other options such as using functions to get the currently registerd Connection object by using the object name rather than the UUID directly.