C#

private void InvokeShowForm(int index){
    if(InvokeRequired){
        Invoke(new ShowFormCallback(ShowForm), new object[]{index}));
    }
    else{
        ShowForm(index);
    }
}

public void ShowForm(int index){
    chatsAvailable[index].Show();
}

[DllImport("user32.dll")]
static extern bool CloseWindow(IntPtr hWnd);

[DllImport("user32.dll")]
static extern System.IntPtr FindWindow(string lpClassName, string lpWindowName);

private void button1_Click(object sender, EventArgs e)
{
  string lpClassName = "WindowClass1";
  string lpWindowName = "MyWindow1";

  IntPtr hWnd = FindWindow(lpClassName, lpWindowName);
  CloseWindow(hWnd);
}

niting85 wrote:

i am not able to update the changes made in SQl database using C# DataAdapter and binding sources

// once, probably in constructor
	contextMenu.Popup+=new System.EventHandler(myPopup);

// event handler
private void myPopup(object sender, EventArgs e) {
	Menu menu=sender as Menu;
	menu.MenuItems.Clear();
	mi=addMenuItem(menu, "Copy File", new EventHandler(CopyFileHandler));
	mi.Enabled=LongNameIsFileSpec;
	mi=addMenuItem(menu, "Explore", new EventHandler(ExploreHandler));
	mi.Enabled=LongNameIsFileSpec;
	...
}

protected MenuItem addMenuItem(Menu menu, string text, EventHandler handler) {
	return addMenuItem(menu, text, Shortcut.None, handler);
}

protected MenuItem addMenuItem(Menu menu, string text, Shortcut sc, 
		EventHandler handler) {
	MenuItem menuItem=new MenuItem(text);
	menuItem.Click+=handler;
	menuItem.Shortcut=sc;
	menu.MenuItems.Add(menuItem);
	menuItem.Enabled=handler!=null;
	return menuItem;
}