mirror of https://github.com/dahall/Vanara.git
45 lines
2.2 KiB
C#
45 lines
2.2 KiB
C#
using System.Runtime.InteropServices.ComTypes;
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namespace Vanara.PInvoke;
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public static partial class Shell32
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{
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/// <summary>
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/// Exposes a method for retrieving the thumbnail handler of an item. Implement this interface if you want to specify what extractor
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/// is used for a child IDList.
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/// </summary>
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// https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-ithumbnailhandlerfactory
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[ComImport, Guid("e35b4b2e-00da-4bc1-9f13-38bc11f5d417"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
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public interface IThumbnailHandlerFactory
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{
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/// <summary>Gets the requested thumbnail handler for the thumbnail of a given item.</summary>
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/// <param name="pidlChild">
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/// <para>Type: <c>PCUITEMID_CHILD</c></para>
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/// <para>The item within the namespace for which the thumbnail handler is being retrieved.</para>
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/// </param>
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/// <param name="pbc">
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/// <para>Type: <c>IBindCtx*</c></para>
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/// <para>A pointer to an IBindCtx to be used during the moniker binding operation of this process.</para>
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/// </param>
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/// <param name="riid">
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/// <para>Type: <c>REFIID</c></para>
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/// <para>A reference to the IID of the interface requested. This is usually IThumbnailProvider or IExtractImage.</para>
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/// </param>
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/// <param name="ppv">
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/// <para>Type: <c>void**</c></para>
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/// <para>
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/// When this method returns, contains the address of a pointer to the requested thumbnail handler. If this method fails, this
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/// value is <c>NULL</c>.
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/// </para>
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/// </param>
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/// <returns>
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/// <para>Type: <c>HRESULT</c></para>
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/// <para>If this method succeeds, it returns <c>S_OK</c>. Otherwise, it returns an <c>HRESULT</c> error code.</para>
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/// </returns>
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/// <remarks>Windows Vista calls the <c>IThumbnailHandlerFactory::GetThumbnailHandler</c> method before falling back on GetUIObjectOf.</remarks>
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// https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-ithumbnailhandlerfactory-getthumbnailhandler
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// HRESULT GetThumbnailHandler( PCUITEMID_CHILD pidlChild, IBindCtx *pbc, REFIID riid, void **ppv );
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[PreserveSig]
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HRESULT GetThumbnailHandler([In] PIDL pidlChild, IBindCtx pbc, in Guid riid, [MarshalAs(UnmanagedType.IUnknown, IidParameterIndex = 2)] out object? ppv);
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}
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} |