internal static bool GetClientSize(IntPtr hwnd, out System.Drawing.Size size)
{
NativeRect rect = new NativeRect();
if (!GetClientRect(hwnd, ref rect))
{
size = new System.Drawing.Size(-1, -1);
return false;
}
size = new System.Drawing.Size(rect.Right, rect.Bottom);
return true;
}
internal static System.Drawing.Size GetNonClientArea(IntPtr hwnd)
{
var c = new NativePoint();
TabbedThumbnailNativeMethods.ClientToScreen(hwnd, ref c);
var r = new NativeRect();
TabbedThumbnailNativeMethods.GetWindowRect(hwnd, ref r);
return new System.Drawing.Size(c.X - r.Left, c.Y - r.Top);
}
internal static extern bool GetClientRect(IntPtr hwnd, ref NativeRect rect);
internal static extern bool GetWindowRect(IntPtr hwnd, ref NativeRect rect);
/// <summary>
/// Selects a portion of a window's client area to display as that window's thumbnail in the taskbar.
/// </summary>
/// <param name="windowHandle">The handle to a window represented in the taskbar. This has to be a top-level window.</param>
/// <param name="clippingRectangle">Rectangle structure that specifies a selection within the window's client area,
/// relative to the upper-left corner of that client area.
/// <para>If this parameter is null, the clipping area will be cleared and the default display of the thumbnail will be used instead.</para></param>
public void SetThumbnailClip(IntPtr windowHandle, Rectangle? clippingRectangle)
{
if (clippingRectangle == null)
{
ClearThumbnailClip(windowHandle);
return;
}
NativeRect rect = new NativeRect();
rect.Left = clippingRectangle.Value.Left;
rect.Top = clippingRectangle.Value.Top;
rect.Right = clippingRectangle.Value.Right;
rect.Bottom = clippingRectangle.Value.Bottom;
IntPtr rectPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(rect));
try
{
Marshal.StructureToPtr(rect, rectPtr, true);
TaskbarList.Instance.SetThumbnailClip(windowHandle, rectPtr);
}
finally
{
Marshal.FreeCoTaskMem(rectPtr);
}
}
public virtual extern void SetRect([In, Out] ref IntPtr phdwp, NativeRect rcBrowser);
