裝置上的 Web 服務程式設計介面會定義並使用下列函式：
- PWSD_SOAP_MESSAGE_HANDLER
- WSD_STUB_FUNCTION
- WSDAllocateLinkedMemory
- WSDAttachLinkedMemory
- WSDCreateDeviceHost
- WSDCreateDeviceHostAdvanced
- WSDCreateDeviceProxy
- WSDCreateDeviceProxyAdvanced
- WSDCreateDiscoveryProvider
- WSDCreateDiscoveryProvider2
- WSDCreateDiscoveryPublisher
- WSDCreateDiscoveryPublisher2
- WSDCreateHttpAddress
- WSDCreateHttpMessageParameters
- WSDCreateOutboundAttachment
- WSDCreateUdpAddress
- WSDCreateUdpMessageParameters
- WSDDetachLinkedMemory
- WSDFreeLinkedMemory
- WSDGenerateFault
- WSDGenerateFaultEx
- WSDGetConfigurationOption
- WSDSetConfigurationOption
- WSDUriDecode
- WSDUriEncode
- WSDXMLAddChild
- WSDXMLAddSibling
- WSDXMLBuildAnyForSingleElement
- WSDXMLCleanupElement
- WSDXMLCreateContext
- WSDXMLGetNameFromBuiltInNamespace
- WSDXMLGetValueFromAny