This should fix most icon scaling issues

Improved the IniReader a bit and replaced some old code.

GreenshotPlugin/Core/Enums/DpiAwarenessContext.cs

@@ -0,0 +1,46 @@
+// Copyright (c) Dapplo and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace GreenshotPlugin.Core.Enums
+{
+    /// <summary>
+    /// </summary>
+    public enum DpiAwarenessContext
+    {
+        /// <summary>
+        ///     DPI unaware.
+        ///     This window does not scale for DPI changes and is always assumed to have a scale factor of 100% (96 DPI).
+        ///     It will be automatically scaled by the system on any other DPI setting.
+        /// </summary>
+        Unaware = -1,
+
+        /// <summary>
+        ///     System DPI aware.
+        ///     This window does not scale for DPI changes.
+        ///     It will query for the DPI once and use that value for the lifetime of the process.
+        ///     If the DPI changes, the process will not adjust to the new DPI value.
+        ///     It will be automatically scaled up or down by the system when the DPI changes from the system value.
+        /// </summary>
+        SystemAware = -2,
+
+        /// <summary>
+        ///     Per monitor DPI aware.
+        ///     This window checks for the DPI when it is created and adjusts the scale factor whenever the DPI changes.
+        ///     These processes are not automatically scaled by the system.
+        /// </summary>
+        PerMonitorAware = -3,
+
+        /// <summary>
+        ///     Also known as Per Monitor v2. An advancement over the original per-monitor DPI awareness mode, which enables applications to access new DPI-related scaling behaviors on a per top-level window basis.
+        ///     Per Monitor v2 was made available in the Creators Update of Windows 10, and is not available on earlier versions of the operating system.
+        ///     The additional behaviors introduced are as follows:
+        ///     * Child window DPI change notifications - In Per Monitor v2 contexts, the entire window tree is notified of any DPI changes that occur.
+        ///     * Scaling of non-client area - All windows will automatically have their non-client area drawn in a DPI sensitive fashion. Calls to EnableNonClientDpiScaling are unnecessary.
+        ///     * Scaling of Win32 menus - All NTUSER menus created in Per Monitor v2 contexts will be scaling in a per-monitor fashion.
+        ///     * Dialog Scaling - Win32 dialogs created in Per Monitor v2 contexts will automatically respond to DPI changes.
+        ///     * Improved scaling of comctl32 controls - Various comctl32 controls have improved DPI scaling behavior in Per Monitor v2 contexts.
+        ///     * Improved theming behavior - UxTheme handles opened in the context of a Per Monitor v2 window will operate in terms of the DPI associated with that window.
+        /// </summary>
+        PerMonitorAwareV2 = -4
+    }
+}