ExpressionStore.GetExpression
.gif "Ee811379.c++_on(en-US,CS.10).gif")
.gif "Ee811379.vb_off(en-US,CS.10).gif")
Use this method to retrieve an ADO hierarchical Recordset object that contains the specified expression.
Definition
Function GetExpression(nExprID As Long) As Object
Parameters
nExprID
[in] A Long that contains the unique identifier of the expression.
Return Values
This method returns an ADO hierarchical Recordset object. If successful, the Recordset object contains the specified expression. If unsuccessful, the Recordset object is set to Nothing.
Error Values
This method sets the Number property of the global Err object to S_OK (&H00000000) to indicate success and to either standard or custom COM error values to indicate failure. For more information about standard COM errors, see Standard COM Errors.
The following table shows the custom COM errors that this method can return.
| Constant | Value | Description |
| E_EXPR_BADCONNECTION | &H8110001F | Invalid connection |
| E_EXPR_BADEXPRID | &H8110000A | Invalid expression ID specified, or expression ID not found in store |
| E_EXPR_NOCONNECTIONSTRING | &H8110000D | No connection string specified |
Additional information may be available using the global Err object. In particular, the Description property may contain a text description of the error.
Remarks
To access all expressions in the connected expression store, use the GetAllExprs method.
Call the Connect method before calling the GetExpression method.
For more information about memory ownership issues related to COM property and method parameters, see Managing COM Parameter Memory.