HRESULT Exists(
BSTRbstrFriendName// in
long *plExists// out
);
The Exists function must be called during add (IClientPaymentProvider::NewPaymentInstance) and modify (IClientPaymentProvider::ManagePaymentInstance) operations before an instance can be created or a friendly name modified. This function ensures that the friendly name being added or modified is unique across all components in the Payment Selector. A warning flag will be returned indicating whether the friendly name already exists. If so, this instance must not be created; the user should be prompted to enter a new friendly name.
This function returns one of the following values.
| Value | Meaning |
|---|---|
| S_OK | Success |
| E_FAIL | Failure |
Note that this interface is exposed to the CPC during the IClientPaymentProvider::Create function, which is called before all other functions. Therefore, the CPC must save the interface pointer to use during add and modify operations.