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interop::GetWindowFromWindowId function (microsoft.ui.interop.h)

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Gets the window handle (HWND) that corresponds to the specified WindowId, if the windowId argument is valid and the system has an HWND that represents the window.

Note

The microsoft.ui.interop.h header has a dependency on microsoft.ui.h, which is not shipped as part of the Windows App SDK. You can run the MIDL compiler (midl.exe) on Microsoft.UI.idl in order to generate microsoft.ui.h. Or just use the functions in the winrt/Microsoft.ui.interop.h header instead.

C#. For C# desktop application developers, the interop functions in this header are wrapped by the methods of the Microsoft.UI.Win32Interop class.

Syntax

HRESULT GetWindowFromWindowId(
  ::ABI::Microsoft::UI::WindowId windowId,
  HWND                           *hwnd
) noexcept;

Parameters

windowId

Type: WindowId

The identifier for the window.

hwnd

Type: HWND

The window handle that corresponds to windowId, if windowId is valid and the system has an HWND that represents the window. Otherwise, null.

Return value

Type: HRESULT

Returns S_OK if the function succeeds. Otherwise, returns a value that indicates the error.

Requirements

Requirement Value
Minimum supported client Windows 10, version 1809 (with Windows App SDK 1.0 or later)
Header microsoft.ui.interop.h

See also

Manage app windows