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IMAPIv2 architecture Creating IMAPIv2 extensions Erase Extension Example Using IMAPIv2 extensions Shell Extension Example Additional Resources Discussion/Q&A

Helper Objects

User-presented content

Helper Objects Stream of prepared content

Helper Objects Logical device commands

Helper Objects OS packaged device commands

Example Scenario A new type of erase is supported by hardware Developer’s goal is to enable this new functionality through Windows for the end user Strategy Create an extension of IMAPIv2 to support the new erase method Expose functionality to users through a shell extension Solution Analysis Extend IMAPIv2 at the Disc Format level Does not involve user content Sends a specific sequence of logical commands to the device Implementation involves media-specific information

interface IEraseSample : IDiscFormat2 { // properties HRESULT Recorder([in] IDiscRecorder2 * value); HRESULT FullErase([in] VARIANT_BOOL value ); HRESULT ClientName([in] BSTR name); // methods HRESULT EraseMedia(); } Simple interface that extends IDiscFormat2 Includes new scenario specific methods and properties

HRESULT PerformErase(VARIANT_BOOL vbFullErase, IDiscRecorder2 *pDiscRecorder) { // create the new object // create the new object CoCreateInstance(CLSID_EraseSample, CoCreateInstance(CLSID_EraseSample, NULL, CLSCTX_ALL, NULL, CLSCTX_ALL, IID_PPV_ARGS(&pErase)); IID_PPV_ARGS(&pErase)); // use IDiscFormat2 method to ensure the operation is supported // use IDiscFormat2 method to ensure the operation is supported pErase->IsCurrentMediaSupported(pDiscRecorder, &vbEraseSupported); pErase->IsCurrentMediaSupported(pDiscRecorder, &vbEraseSupported); if (vbEraseSupported) { if (vbEraseSupported) { // attach the standard disc recorder // attach the standard disc recorder pErase->put_Recorder(pDiscRecorder); pErase->put_Recorder(pDiscRecorder); // set the appropriate properties // set the appropriate properties pErase->put_FullErase(vbFullErase); pErase->put_FullErase(vbFullErase); pErase->put_ClientName(SysAllocString(L"EraseShellExt")); pErase->put_ClientName(SysAllocString(L"EraseShellExt")); // perform the erase! // perform the erase! pErase->EraseMedia(); pErase->EraseMedia(); }}

Documentation and Examples MSDN WDK and SDK IMAPIv2 on WHDC Contact Information Optical Platform Discussion Forum Please don’t send code to this alias! microsoft.com

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