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https://github.com/9ParsonsB/Pulsar.git
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WIP: observatory UI overhaul
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Xjph
310
ObservatoryCore/UI/DwmHelper.cs
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310
ObservatoryCore/UI/DwmHelper.cs
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// Source: https://stackoverflow.com/questions/51578104/how-to-create-a-semi-transparent-or-blurred-backcolor-in-a-windows-form
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using System.Runtime.InteropServices;
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using System.Security;
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[SuppressUnmanagedCodeSecurity]
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public class DwmHelper
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{
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public const int WM_DWMCOMPOSITIONCHANGED = 0x031E;
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public struct MARGINS
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{
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public int leftWidth;
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public int rightWidth;
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public int topHeight;
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public int bottomHeight;
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public MARGINS(int LeftWidth, int RightWidth, int TopHeight, int BottomHeight)
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{
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leftWidth = LeftWidth;
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rightWidth = RightWidth;
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topHeight = TopHeight;
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bottomHeight = BottomHeight;
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}
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public void NoMargins()
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{
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leftWidth = 0;
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rightWidth = 0;
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topHeight = 0;
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bottomHeight = 0;
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}
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public void SheetOfGlass()
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{
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leftWidth = -1;
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rightWidth = -1;
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topHeight = -1;
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bottomHeight = -1;
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}
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}
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[Flags]
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public enum DWM_BB
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{
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Enable = 1,
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BlurRegion = 2,
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TransitionOnMaximized = 4
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}
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// https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
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public enum DWMWINDOWATTRIBUTE : uint
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{
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NCRenderingEnabled = 1, //Get atttribute
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NCRenderingPolicy, //Enable or disable non-client rendering
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TransitionsForceDisabled,
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AllowNCPaint,
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CaptionButtonBounds, //Get atttribute
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NonClientRtlLayout,
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ForceIconicRepresentation,
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Flip3DPolicy,
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ExtendedFrameBounds, //Get atttribute
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HasIconicBitmap,
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DisallowPeek,
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ExcludedFromPeek,
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Cloak,
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Cloaked, //Get atttribute. Returns a DWMCLOACKEDREASON
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FreezeRepresentation,
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PassiveUpdateMode,
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UseHostBackDropBrush,
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AccentPolicy = 19, // Win 10 (undocumented)
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ImmersiveDarkMode = 20, // Win 11 22000
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WindowCornerPreference = 33, // Win 11 22000
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BorderColor, // Win 11 22000
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CaptionColor, // Win 11 22000
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TextColor, // Win 11 22000
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VisibleFrameBorderThickness, // Win 11 22000
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SystemBackdropType // Win 11 22621
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}
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public enum DWMCLOACKEDREASON : uint
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{
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DWM_CLOAKED_APP = 0x0000001, //cloaked by its owner application.
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DWM_CLOAKED_SHELL = 0x0000002, //cloaked by the Shell.
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DWM_CLOAKED_INHERITED = 0x0000004 //inherited from its owner window.
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}
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public enum DWMNCRENDERINGPOLICY : uint
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{
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UseWindowStyle, // Enable/disable non-client rendering based on window style
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Disabled, // Disabled non-client rendering; window style is ignored
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Enabled, // Enabled non-client rendering; window style is ignored
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};
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public enum DWMACCENTSTATE
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{
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ACCENT_DISABLED = 0,
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ACCENT_ENABLE_GRADIENT = 1,
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ACCENT_ENABLE_TRANSPARENTGRADIENT = 2,
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ACCENT_ENABLE_BLURBEHIND = 3,
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ACCENT_INVALID_STATE = 4
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}
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[Flags]
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public enum CompositionAction : uint
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{
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DWM_EC_DISABLECOMPOSITION = 0,
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DWM_EC_ENABLECOMPOSITION = 1
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}
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// Values designating how Flip3D treats a given window.
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enum DWMFLIP3DWINDOWPOLICY : uint
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{
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Default, // Hide or include the window in Flip3D based on window style and visibility.
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ExcludeBelow, // Display the window under Flip3D and disabled.
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ExcludeAbove, // Display the window above Flip3D and enabled.
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};
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public enum ThumbProperties_dwFlags : uint
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{
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RectDestination = 0x00000001,
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RectSource = 0x00000002,
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Opacity = 0x00000004,
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Visible = 0x00000008,
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SourceClientAreaOnly = 0x00000010
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct AccentPolicy
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{
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public DWMACCENTSTATE AccentState;
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public int AccentFlags;
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public int GradientColor;
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public int AnimationId;
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public AccentPolicy(DWMACCENTSTATE accentState, int accentFlags, int gradientColor, int animationId)
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{
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AccentState = accentState;
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AccentFlags = accentFlags;
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GradientColor = gradientColor;
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AnimationId = animationId;
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}
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct DWM_BLURBEHIND
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{
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public DWM_BB dwFlags;
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public int fEnable;
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public IntPtr hRgnBlur;
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public int fTransitionOnMaximized;
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public DWM_BLURBEHIND(bool enabled)
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{
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dwFlags = DWM_BB.Enable;
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fEnable = (enabled) ? 1 : 0;
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hRgnBlur = IntPtr.Zero;
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fTransitionOnMaximized = 0;
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}
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public Region Region => Region.FromHrgn(hRgnBlur);
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public bool TransitionOnMaximized
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{
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get => fTransitionOnMaximized > 0;
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set
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{
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fTransitionOnMaximized = (value) ? 1 : 0;
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dwFlags |= DWM_BB.TransitionOnMaximized;
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}
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}
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public void SetRegion(Graphics graphics, Region region)
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{
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hRgnBlur = region.GetHrgn(graphics);
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dwFlags |= DWM_BB.BlurRegion;
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}
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}
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[StructLayout(LayoutKind.Sequential)]
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public struct WinCompositionAttrData
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{
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public DWMWINDOWATTRIBUTE Attribute;
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public IntPtr Data; //Will point to an AccentPolicy struct, where Attribute will be DWMWINDOWATTRIBUTE.AccentPolicy
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public int SizeOfData;
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public WinCompositionAttrData(DWMWINDOWATTRIBUTE attribute, IntPtr data, int sizeOfData)
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{
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Attribute = attribute;
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Data = data;
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SizeOfData = sizeOfData;
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}
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}
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private static int GetBlurBehindPolicyAccentFlags()
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{
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int drawLeftBorder = 20;
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int drawTopBorder = 40;
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int drawRightBorder = 80;
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int drawBottomBorder = 100;
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return (drawLeftBorder | drawTopBorder | drawRightBorder | drawBottomBorder);
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}
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//https://msdn.microsoft.com/en-us/library/windows/desktop/aa969508(v=vs.85).aspx
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[DllImport("dwmapi.dll")]
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internal static extern int DwmEnableBlurBehindWindow(IntPtr hwnd, ref DWM_BLURBEHIND blurBehind);
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[DllImport("dwmapi.dll", PreserveSig = false)]
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public static extern void DwmEnableComposition(CompositionAction uCompositionAction);
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//https://msdn.microsoft.com/it-it/library/windows/desktop/aa969512(v=vs.85).aspx
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[DllImport("dwmapi.dll")]
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internal static extern int DwmExtendFrameIntoClientArea(IntPtr hWnd, ref MARGINS pMarInset);
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//https://msdn.microsoft.com/en-us/library/windows/desktop/aa969515(v=vs.85).aspx
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[DllImport("dwmapi.dll")]
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internal static extern int DwmGetWindowAttribute(IntPtr hwnd, DWMWINDOWATTRIBUTE attr, ref int attrValue, int attrSize);
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//https://msdn.microsoft.com/en-us/library/windows/desktop/aa969524(v=vs.85).aspx
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[DllImport("dwmapi.dll")]
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internal static extern int DwmSetWindowAttribute(IntPtr hwnd, DWMWINDOWATTRIBUTE attr, ref int attrValue, int attrSize);
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[DllImport("User32.dll", SetLastError = true)]
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internal static extern int SetWindowCompositionAttribute(IntPtr hwnd, ref WinCompositionAttrData data);
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[DllImport("dwmapi.dll")]
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internal static extern int DwmIsCompositionEnabled(ref int pfEnabled);
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public static bool IsCompositionEnabled()
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{
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int pfEnabled = 0;
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int result = DwmIsCompositionEnabled(ref pfEnabled);
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return (pfEnabled == 1) ? true : false;
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}
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public static bool IsNonClientRenderingEnabled(IntPtr hWnd)
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{
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int gwaEnabled = 0;
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int result = DwmGetWindowAttribute(hWnd, DWMWINDOWATTRIBUTE.NCRenderingEnabled, ref gwaEnabled, sizeof(int));
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return gwaEnabled == 1;
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}
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public static bool WindowSetAttribute(IntPtr hWnd, DWMWINDOWATTRIBUTE attribute, int attributeValue)
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{
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int result = DwmSetWindowAttribute(hWnd, attribute, ref attributeValue, sizeof(int));
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return (result == 0);
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}
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public static void Windows10EnableBlurBehind(IntPtr hWnd)
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{
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DWMNCRENDERINGPOLICY policy = DWMNCRENDERINGPOLICY.Enabled;
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WindowSetAttribute(hWnd, DWMWINDOWATTRIBUTE.NCRenderingPolicy, (int)policy);
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AccentPolicy accPolicy = new AccentPolicy()
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{
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AccentState = DWMACCENTSTATE.ACCENT_ENABLE_BLURBEHIND,
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};
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int accentSize = Marshal.SizeOf(accPolicy);
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IntPtr accentPtr = Marshal.AllocHGlobal(accentSize);
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Marshal.StructureToPtr(accPolicy, accentPtr, false);
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var data = new WinCompositionAttrData(DWMWINDOWATTRIBUTE.AccentPolicy, accentPtr, accentSize);
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SetWindowCompositionAttribute(hWnd, ref data);
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Marshal.FreeHGlobal(accentPtr);
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}
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public static bool WindowEnableBlurBehind(IntPtr hWnd)
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{
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DWMNCRENDERINGPOLICY policy = DWMNCRENDERINGPOLICY.Enabled;
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WindowSetAttribute(hWnd, DWMWINDOWATTRIBUTE.NCRenderingPolicy, (int)policy);
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DWM_BLURBEHIND dwm_BB = new DWM_BLURBEHIND(true);
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int result = DwmEnableBlurBehindWindow(hWnd, ref dwm_BB);
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return result == 0;
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}
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public static bool WindowExtendIntoClientArea(IntPtr hWnd, MARGINS margins)
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{
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// Extend frame on the bottom of client area
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int result = DwmExtendFrameIntoClientArea(hWnd, ref margins);
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return result == 0;
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}
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public static bool WindowBorderlessDropShadow(IntPtr hWnd, int shadowSize)
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{
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MARGINS margins = new MARGINS(0, shadowSize, 0, shadowSize);
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int result = DwmExtendFrameIntoClientArea(hWnd, ref margins);
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return result == 0;
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}
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public static bool WindowSheetOfGlass(IntPtr hWnd)
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{
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MARGINS margins = new MARGINS();
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//Margins set to All:-1 - Sheet Of Glass effect
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margins.SheetOfGlass();
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int result = DwmExtendFrameIntoClientArea(hWnd, ref margins);
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return result == 0;
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}
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public static bool WindowDisableRendering(IntPtr hWnd)
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{
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int ncrp = (int)DWMNCRENDERINGPOLICY.Disabled;
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// Disable non-client area rendering on the window.
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int result = DwmSetWindowAttribute(hWnd, DWMWINDOWATTRIBUTE.NCRenderingPolicy, ref ncrp, sizeof(int));
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return result == 0;
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}
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}
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