Hi,
They probably are doing this by reparenting their window to the window which
represents the navbar.
Within C# / .NET CF it is all a bit of a hack (and I would not really even
recommend doing it at the native level...) but if you follow these
instructions hopefully it is something close to what you want...
Start off by adding a new form to your project (I called it "IconForm"), and
set the following properties.
FormBorderStyle = none
MaximizeBox = false
ControlBox = false
Size = 24,24
Also make sure you delete the MainMenu instance.
Then add the following class to your project
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public static class FormExtensions
{
public static void ReparentToNavBar(this Form form, Point location)
{
IntPtr hWndParent = FindWindow("HHTaskBar", null);
Reparent(form, hWndParent, location);
}
// Reparents "form" to be a child of "hWndParent" positioned
// using the x,y co-ordinates specified by "location".
public static void Reparent(this Form form, IntPtr hWndParent, Point
location)
{
IntPtr hWndChild = form.Handle;
// Remove the WS_POPUP window style and
// add the WS_CHILD window style
uint style = GetWindowLong(hWndChild, GWL_STYLE);
style &= ~WS_POPUP;
style |= WS_CHILD;
SetWindowLong(hWndChild, GWL_STYLE, style);
// Reparent the window
SetParent(hWndChild, hWndParent);
// Adjust the positioning of the form
form.Location = location;
}
private const uint WS_POPUP = 0x80000000;
private const uint WS_CHILD = 0x40000000;
private const uint WS_EX_TOPMOST = 0x00000008;
private const int GWL_STYLE = -16;
private const int GWL_EXSTYLE = -20;
[DllImport("coredll.dll")]
private static extern uint GetWindowLong(IntPtr hWnd, int nIndex);
[DllImport("coredll.dll")]
private static extern uint SetWindowLong(IntPtr hWnd, int nIndex, uint
dwNewLong);
[DllImport("coredll.dll")]
private static extern IntPtr FindWindow(string lpClassName, string
lpWindowName);
[DllImport("coredll.dll")]
private static extern IntPtr SetParent(IntPtr hWndChild, IntPtr
hWndNewParent);
}
Once this has been done, you should be able to add a button click event
handler or something similiar to invoke the code to add your custom window
to the nav bar. A code snippet similiar to the following should be
sufficient:
Form f = new IconForm(); // or what ever you named your custom form
f.Show();
f.ReparentToNavBar(new Point(45, 0));
And to remove it, you would simply execute
f.Close();
f.Dispose();
You should see that this window appears on the top of your screen, and