MDAC 2.5 SDK - OLE DB Providers
OSP Toolkit

OLEDBSimpleProvider::getColumnCount

Returns the number of columns in the data set.

HRESULT getColumnCount (
   LONG *       pcColumns);

Parameters

pcColumns

[out]
A pointer to the number of columns returned by the pcColumns argument. The number does not include the column label information. For asynchronous operations unable to determine a column count (using OLEDBSimpleProvider::getEstimatedRows), a negative value may indicate that the operation is complete, which can cause unexpected results.

Return Codes

S_OK

The method succeeded.

E_FAIL

A provider-specific error occurred.

Comments

Returned column values from an asynchronous operation cannot be negative.