Retrieves a list of all available port suppliers.
HRESULT EnumPortSuppliers(
   IEnumDebugPortSuppliers2** ppEnum
);
int EnumPortSuppliers(
   out IEnumDebugPortSuppliers2 ppEnum
);
Parameters
- ppEnum
[out] Returns an IEnumDebugPortSuppliers2 object that contains a list of all port suppliers. 
Return Value
If successful, returns S_OK; otherwise, returns an error code.