|Microsoft DirectX 9.0|
The Active method notifies the pin that the filter is now active.
Returns an HRESULT value. Possible values include those listed in the following table.
|VFW_E_NO_ALLOCATOR||No allocator is available.|
This method overrides the CBasePin::Active method. It calls the IMemAllocator::Commit method on the allocator, to allocate memory for buffers.
If you override this method, call the base-class method from your overriding method.