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How to access SBO objects within UDO-DLL


I have a problem of accessing the SBO objects within the UDO-DLL (in C++).

Here is the scenario. I created a UDO (CIM_MWO), which represents MyWorkOrder. Whenever a new MyWorkOrder is to add to the system, I need to check the item availability. Here is the pseudo code.



// From this instance of MyWorkOrder

// 1. Gets item no.

wchar_t* itemNo;

long len = GetValueLength(...);


GetValue( itemNo );


// 2. Gets qty required

// ...

// HERE I need the QuantityOnStock

// and other info of the specified item.

// HOW can I get it???

// ...

// if enough qty available

// return CSboBusinessObject::OnAdd();

// else

// return E_NO_ENOUGH_STOCK;


Option 1:

I can get the item like this:

CSboBusinessObject* item =

CreateBusinessObject( "4" );

item->GetByKey( itemNo );


BUT I don't know the field alias for property "QuantityOnStock" if calling GetValue(...)

Option 2:

Using the DI API, like this:

IUnknown* item = pDICompany->GetBusinessObject( "4" );

item->GetByKey( itemNo );


BUT there is problem of getting the **pDICompany**

Is there anyone can offer some clue on this? Thanks.


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1 Answer

  • Best Answer
    Posted on Feb 02, 2005 at 12:38 PM


    You must use the class CSBODataAccessGate to obtain a representation of the table representing your UDO.

    CSboDataAccessGate dagMOR1 = GetDAG (ArrayOffset);

    Then you work with your CSboDataAccessGate to obtain all information about your UDO table (you can for example use the function DoQuery to obtain a list of records with a special characteristic).

    You have a sample into the UDO samples, it is called MealOrder/DllImplement.

    You have also a special UDO Help file, you can have a look at the different objects and functions to implement a dll.

    Hope it helps


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    • Former Member Maria Trinidad MARTINEZ GEA

      Hi Trinidad,

      Thanks very much for your help. I think I got at least a workable solution, though it's not perfect. To map the wanted properties described in DI API to table fields is a sort of tedious task.

      Actually, I tried a quite number of hours to work out a solution based on the option 2 in my original post. But not succeeded yet 😔

      I have a SBO add-on EXE (VB.NET), a UDO DLL (VC+) for MyWorkOrder. I tried to expose a COM (which contains DI Company reference) in the EXE, but failed because of the .NET restriction, or my mistake (not sure yet). I even tried to create a DCOM exe (VC+) as a pipe to transfer the DI company reference from add-on exe to UDO DLL, but failed and every time I got different error message ("invalid memory access", "Object is not connected to server", or "invalid cast"). However, I succeeded in transfering a integer from add-on exe to UDO DLL via such pipe.

      I hope what I described here can be helpful for those who are working or will work on a similar scenario. Also, If someone can offer any solution on the issues mentioned above, I'll appreciate it very much. Thanks.


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