63 lines
1.7 KiB
C#
63 lines
1.7 KiB
C#
/*
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* Copyright (c) 2022 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Runtime.InteropServices;
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namespace SafeExamBrowser.UserInterface.Shared.Utilities
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{
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/// <remarks>
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/// See https://docs.microsoft.com/en-us/windows/win32/dwm/thumbnail-ovw.
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/// </remarks>
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public static class Thumbnail
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{
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public const int DWM_TNP_VISIBLE = 0x8;
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public const int DWM_TNP_OPACITY = 0x4;
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public const int DWM_TNP_RECTDESTINATION = 0x1;
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public const int S_OK = 0;
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[DllImport("dwmapi.dll")]
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public static extern int DwmQueryThumbnailSourceSize(IntPtr thumbnail, out Size size);
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[DllImport("dwmapi.dll")]
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public static extern int DwmRegisterThumbnail(IntPtr destinationWindow, IntPtr sourceWindow, out IntPtr thumbnail);
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[DllImport("dwmapi.dll")]
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public static extern int DwmUnregisterThumbnail(IntPtr thumbnail);
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[DllImport("dwmapi.dll")]
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public static extern int DwmUpdateThumbnailProperties(IntPtr thumbnail, ref Properties properties);
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[StructLayout(LayoutKind.Sequential)]
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public struct Properties
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{
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public int Flags;
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public Rectangle Destination;
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public Rectangle Source;
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public byte Opacity;
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public bool Visible;
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public bool SourceClientAreaOnly;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct Size
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{
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public int X;
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public int Y;
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct Rectangle
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{
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public int Left;
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public int Top;
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public int Right;
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public int Bottom;
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}
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}
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}
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