src/Demo/Classes/NativeMethods.cs

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using System.Runtime.InteropServices;
using System;

namespace XRails_LoginUI.Demo.Classes
{
    internal static class NativeMethods
    {
        #region DWM Functions

        /// <summary>
        /// Extends the window frame into the client area.
        /// </summary>
        /// 
        /// <param name="hWnd">
        /// The handle to the window in which the frame will be extended into
        /// the client area.
        /// </param>
        /// 
        /// <param name="pMarInset">
        /// A pointer to a <see cref="MARGINS"/> structure that describes the margins to use
        /// when extending the frame into the client area.
        /// </param>
        [DllImport("dwmapi.dll")]
        internal static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset);

        /// <summary>
        /// Obtains a value that indicates whether Desktop Window Manager (DWM)
        /// composition is enabled.
        /// </summary>
        /// 
        /// <param name="pfEnabled">
        /// A pointer to a value that, when this function returns successfully,
        /// receives TRUE if DWM composition is enabled; otherwise, FALSE.
        /// </param>
        [DllImport("dwmapi.dll")]
        internal static extern int DwmIsCompositionEnabled(out bool pfEnabled);

        /// <summary>
        /// Sets the value of non-client rendering attributes for a window.
        /// </summary>
        /// 
        /// <param name="hwnd">
        /// The handle to the window that will receive the attributes.
        /// </param>
        /// 
        /// <param name="dwAttribute">
        /// A single <see cref="DWMWINDOWATTRIBUTE"/> flag to apply to the window.
        /// </param>
        /// 
        /// <param name="pvAttribute ">
        /// A pointer to the value of the attribute specified in the 
        /// <paramref name="dwAttribute"/> parameter.
        /// </param>
        /// 
        /// <param name="cbAttribute">
        /// The size, in bytes, of the value type pointed to by the
        /// <paramref name="pvAttribute"/> parameter.
        /// </param>
        [DllImport("dwmapi.dll")]
        internal static extern int DwmSetWindowAttribute(IntPtr hwnd, DWMWINDOWATTRIBUTE dwAttribute, ref int pvAttribute, int cbAttribute);