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Add Windows SDK 10.0.28000.1839 (April 2026) release notes and downloads
Co-authored-by: Copilot <[email protected]>
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‎hub/apps/windows-sdk/downloads.md‎

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| Release | Downloads |
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| ----- | -------------------------------------- |
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| **Windows SDK for Windows 11 (10.0.28000.1839)** <br/> April 2026 <br/> [Release notes](./release-notes.md#build-100280001839) | [Installer](https://go.microsoft.com/fwlink/?linkid=2361309) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2361406) |
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| **Windows SDK for Windows 11 (10.0.28000.1721)** <br/> March 2026 <br/> [Release notes](./release-notes.md#build-100280001721) | [Installer](https://go.microsoft.com/fwlink/?linkid=2357925) <br/> [ISO](https://go.microsoft.com/fwlink/?linkid=2357642) |
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| **Windows SDK for Windows 11 26H1 for OEMs and Partners (10.0.28000.1)** <br/> November 2025 | [Installer](//go.microsoft.com/fwlink/?linkid=2342535) <br/> [ISO](//go.microsoft.com/fwlink/?linkid=2343616) |
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‎hub/apps/windows-sdk/release-notes.md‎

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## 28000 versions
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## Build 10.0.28000.1839
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Released: **April, 2026** <br><br>
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<details>
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<summary>WinRT API additions and updates</summary>
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> **Windows.Devices.Haptics** (UniversalApiContract 19.0):
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> <br/>
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> New properties on `KnownSimpleHapticsControllerWaveforms`:
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>
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> - `Collide` — Waveform ID for collision haptic feedback
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> - `Align` — Waveform ID for alignment haptic feedback
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> - `Step` — Waveform ID for step haptic feedback
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> - `Grow` — Waveform ID for growth haptic feedback
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>
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> **Windows.Devices.Printers**:
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> <br/>
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> Graduated from experimental to stable:
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>
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> - `VirtualPrinterInstallationStatus` enum — Installation status values including `InstallationSucceeded`
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> - `VirtualPrinterPreferredInputFormat` enum — Preferred input format values including `OpenXps`
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> - `IVirtualPrinterInstallationParameters` interface
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> - `IVirtualPrinterInstallationResult` interface
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> - `IVirtualPrinterManagerStatics` interface
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> - `IVirtualPrinterSupportedFormat` interface
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> - `IVirtualPrinterSupportedFormatFactory` interface
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> - `VirtualPrinterInstallationParameters` runtime class
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> - `VirtualPrinterInstallationResult` runtime class
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> - `VirtualPrinterSupportedFormat` runtime class
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>
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> **Windows.Media.ClosedCaptioning** (UniversalApiContract 15.0):
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> <br/>
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> New types:
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>
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> - `ClosedCaptionTheme` runtime class — Represents a closed caption theme with customization support
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> - `IClosedCaptionTheme` interface — Properties: `Id`, `DisplayName`, `FontColor`, `ComputedFontColor`, `FontOpacity`, `FontSize`, `FontStyle`, `FontEffect`, `BackgroundColor`, `ComputedBackgroundColor`, `BackgroundOpacity`, `RegionColor`, `ComputedRegionColor`, `RegionOpacity`
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> - `IClosedCaptionThemeStatics` interface — Methods: `GetAvailableThemes`, `GetSelectedTheme`, `TrySetSelectedTheme`; Events: `ThemesChanged`, `SelectedThemeChanged`
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</details>
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<details>
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<summary>WinRT Experimental API additions</summary>
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> **Windows.Storage.Search** (UniversalApiContract 19.0):
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> <br/>
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> New interface:
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>
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> - `IQueryOptionsAdditionalSearchSources` — Adds `IncludeCloudProviders` and `IncludeLocalSemanticIndex` properties to `QueryOptions`
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</details>
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<details>
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<summary>Win32 API additions and updates</summary>
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> **Bluetooth Hands-Free Profile (bthdef.h)**
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> <br/>
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> Added comprehensive Bluetooth Hands-Free Profile (HFP) feature constants:
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>
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> - `HFP_AG_SDP_SUPPORTED_FEATURE_*` — Audio Gateway SDP supported feature flags for three-way calling, echo cancellation, voice recognition, in-band ring tone, voice tag, wide-band speech, and more
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> - `HFP_AG_BRSF_SUPPORTED_FEATURE_*` — Audio Gateway BRSF supported feature flags for three-way calling, echo cancellation, voice recognition, codec negotiation, and more
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> - `HFP_HF_SDP_SUPPORTED_FEATURE_*` — Hands-Free SDP supported feature flags for echo cancellation, three-way calling, CLI presentation, voice recognition, and more
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> - `HFP_HF_BRSF_SUPPORTED_FEATURE_*` — Hands-Free BRSF supported feature flags for echo cancellation, three-way calling, voice recognition, codec negotiation, and more
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> - `HFP_NETWORK_NO_ABILITY_TO_REJECT`, `HFP_NETWORK_ABILITY_TO_REJECT` — Network call rejection capability flags
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>
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> **Graphics / Display (d3dkmdt.h)**
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> <br/>
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> Updated struct:
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>
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> - `_D3DKMT_DISPLAY_CAPS` — Added `CursorDoesNotSupportXorBlendWithMultiPlaneOverlay` bitfield
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>
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> **Graphics / Direct3D Kernel (d3dkmthk.h)**
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> <br/>
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> New APIs and structs for process debug blob collection:
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>
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> - `D3DKMT_MAPPROCESSDEBUGBLOB` / `D3DKMT_UNMAPPROCESSDEBUGBLOB` — Structs for mapping and unmapping process debug blobs
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> - `D3DKMT_DEVICE_MARKED_AS_ERROR_INFO` — Struct for device error information
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> - `DXGK_FEATURE_PROCESS_DEBUG_BLOB_COLLECTION_INTERFACE_V1` — Feature interface for debug blob collection
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> - `D3DKMT_DEVICE_MARKED_AS_ERROR_FAILURE_CODE` — Enum for device error failure codes
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> - `PFND3DKMT_ENABLEPROCESSDEBUGBLOBCOLLECTION`, `PFND3DKMT_DISABLEPROCESSDEBUGBLOBCOLLECTION`, `PFND3DKMT_MAPPROCESSDEBUGBLOB`, `PFND3DKMT_UNMAPPROCESSDEBUGBLOB` — Function pointers for debug blob operations
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>
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> **Graphics / Display Driver (d3dukmdt.h)**
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> <br/>
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> New driver feature:
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>
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> - `DXGK_DRIVER_FEATURE_PROCESS_DEBUG_BLOB_COLLECTION` — Driver feature for process debug blob collection
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> - `DXGK_FEATURE_PROCESS_DEBUG_BLOB_COLLECTION` — Feature ID for process debug blob collection
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>
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> **HID Usages (hidusage.h)**
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> <br/>
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> New haptics usage values:
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>
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> - `HID_USAGE_HAPTICS_WAVEFORM_COLLIDE`, `HID_USAGE_HAPTICS_WAVEFORM_ALIGN`, `HID_USAGE_HAPTICS_WAVEFORM_STEP`, `HID_USAGE_HAPTICS_WAVEFORM_GROW`
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>
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> **Storage / SCSI (ntddscsi.h)**
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> <br/>
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> New define:
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>
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> - `BOOT_PARTITION_STATUS_WRITE_PROHIBITED` — Boot partition write protection status flag
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>
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> **Error Codes (ntstatus.h / winerror.h)**
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> <br/>
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> New error definitions:
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>
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> - `STATUS_VSM_FW_MEASUREMENTS_SEAL_FAILURE` — VSM firmware measurements seal failure
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> - `ERROR_VSM_FW_MEASUREMENTS_SEAL_FAILURE` — Corresponding Win32 error code
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>
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> **NVMe (nvme.h)**
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> <br/>
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> Fixed typo:
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>
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> - `NVME_LOG_PAGE_BOOT_PARTITON` renamed to `NVME_LOG_PAGE_BOOT_PARTITION`
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>
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> **Security / SSPI (sspi.h)**
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> <br/>
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> New GUID:
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>
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> - `SEC_WINNT_AUTH_DATA_TYPE_PLACEHOLDER` — Placeholder authentication data type
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>
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> **Security / LSA (ntlsa.h)**
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> <br/>
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> New agent-based authentication APIs:
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>
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> - `LsaCreateAgentAccount` — Creates an agent account
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> - `LsaRetrieveAgentLogonCredential` — Retrieves agent logon credentials
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> - `LsaEnumerateAgentAccounts` — Enumerates agent accounts
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> - `LsaDeleteAgentAccount` — Deletes an agent account
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> - `LsaGetAgentOwner` — Gets the agent owner
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> - `LSA_AGENT_LOGON_CREDENTIAL` — Agent logon credential struct
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> - `LSA_AGENT_ACCOUNT_INFO` — Agent account information struct
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> - `LSA_AGENT_ACCOUNT_LIST` — List of agent accounts struct
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>
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> **Security / Authentication (NTSecPKG.h)**
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> <br/>
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> New definitions:
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>
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> - `KSecAllocateContextBuffer` — Function for allocating security context buffers
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> - Added `extern "C"` guards for C++ compatibility
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>
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> **Content Indexing (NTQuery.h)**
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> <br/>
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> New define:
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>
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> - `CI_VERSION_CORRID` — Content index correlation ID version constant
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>
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> **Text Services (TextStor.h)**
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> <br/>
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> New defines:
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>
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> - `TS_SD_DISABLEWRITINGSUGGESTIONS` — Flag to disable writing suggestions
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> - `TS_SS_MULTILINE` — Flag for multiline text store support
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>
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> **WRL Async (wrl/async.h)**
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> <br/>
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> Updated:
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>
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> - Async completion handling reworked for thread safety using `_InterlockedCompareExchange` and reference counting (`cCompleteDelegateRefCount_`)
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</details>
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<details>
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<summary>COM API updates</summary>
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> **Edition Upgrade Helper (EditionUpgradeHelper.idl)**
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> <br/>
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> Updated method:
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>
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> - `IClipServiceNotificationHelper::ShowToast` — Parameter list simplified from 5 BSTR parameters to `void`
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>
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> **Text Services Framework (TextStor.idl)**
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> <br/>
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> New constants:
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>
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> - `TS_SD_DISABLEWRITINGSUGGESTIONS` — Flag to disable writing suggestions
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> - `TS_SS_MULTILINE` — Flag for multiline text store support
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</details>
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---
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## Build 10.0.28000.1721
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Released: **March, 2026** <br><br>

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