public static void SetOverlayIcon(IntPtr windowHandle, IntPtr iconHandle, string description)
{
if (taskbarSupported)
{
taskbarInstance.SetOverlayIcon(windowHandle, iconHandle, description);
}
}
public static void SetOverlayIcon(IntPtr hwnd, IntPtr icon, string description)
{
if (IsInitialized)
{
taskbar.SetOverlayIcon(hwnd, icon, description);
}
}
// Overlays ============================================
/// <summary>Applies an overlay to a taskbar button to indicate application status or a notification to the user.</summary>
/// <param name="parent">
/// The window whose associated taskbar button receives the overlay. This window must belong to a calling process associated with the button's application.
/// </param>
/// <param name="icon">
/// The icon to use as the overlay. This should be a small icon, measuring 16x16 pixels at 96 dpi. If an overlay icon is already applied to the taskbar
/// button, that existing overlay is replaced.
/// <para>
/// This value can be <see langword="null"/>. How a <see langword="null"/> value is handled depends on whether the taskbar button represents a single
/// window or a group of windows.
/// </para>
/// <list type="bullet">
/// <item><term>If the taskbar button represents a single window, the overlay icon is removed from the display.</term></item>
/// <item><term>If the taskbar button represents a group of windows and a previous overlay is still available (received earlier than the current overlay, but not yet
/// freed by a NULL value), then that previous overlay is displayed in place of the current overlay.</term></item>
/// </list>
/// </param>
/// <param name="description">A string that provides an alt text version of the information conveyed by the overlay, for accessibility purposes.</param>
public static void SetOverlayIcon(IWin32Window parent, Icon icon, string description)
{
Validate7OrLater();
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
taskbar4?.SetOverlayIcon(parent.Handle, icon == null ? IntPtr.Zero : icon.Handle, description);
}
/// <summary>
/// Applies an overlay to a taskbar button of the main application window to indicate application status or a notification to the user.
/// </summary>
/// <param name="icon">The overlay icon</param>
/// <param name="accessibilityText">String that provides an alt text version of the information conveyed by the overlay, for accessibility purposes</param>
public void SetOverlayIcon(System.Drawing.Icon icon, string accessibilityText)
{
CoreHelpers.ThrowIfNotWin7();
TaskbarList.SetOverlayIcon(OwnerHandle, icon != null ? icon.Handle : IntPtr.Zero, accessibilityText);
}