C# Signature:
[DllImport("user32.dll")]
static extern bool EnumDesktopWindows(IntPtr hDesktop,
EnumDesktopWindowsDelegate lpfn, IntPtr lParam);
User-Defined Types:
private delegate bool EnumDesktopWindowsDelegate(IntPtr hWnd, int lParam);
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System;
using System.Text;
/// <summary>
/// EnumDesktopWindows Demo - shows the caption of all desktop windows.
/// Authors: Svetlin Nakov, Martin Kulov
/// Bulgarian Association of Software Developers - http://www.devbg.org/en/
/// </summary>
public class user32
{
/// <summary>
/// filter function
/// </summary>
/// <param name="hWnd"></param>
/// <param name="lParam"></param>
/// <returns></returns>
public delegate bool EnumDelegate(IntPtr hWnd, int lParam);
/// <summary>
/// check if windows visible
/// </summary>
/// <param name="hWnd"></param>
/// <returns></returns>
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool IsWindowVisible(IntPtr hWnd);
/// <summary>
/// return windows text
/// </summary>
/// <param name="hWnd"></param>
/// <param name="lpWindowText"></param>
/// <param name="nMaxCount"></param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "GetWindowText",
ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true)]
public static extern int GetWindowText(IntPtr hWnd, StringBuilder lpWindowText, int nMaxCount);
/// <summary>
/// enumarator on all desktop windows
/// </summary>
/// <param name="hDesktop"></param>
/// <param name="lpEnumCallbackFunction"></param>
/// <param name="lParam"></param>
/// <returns></returns>
[DllImport("user32.dll", EntryPoint = "EnumDesktopWindows",
ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool EnumDesktopWindows(IntPtr hDesktop, EnumDelegate lpEnumCallbackFunction, IntPtr lParam);
/// <summary>
/// entry point of the program
/// </summary>
static void Main()
{
var collection = new List<string>();
user32.EnumDelegate filter = delegate(IntPtr hWnd, int lParam)
{
StringBuilder strbTitle = new StringBuilder(255);
int nLength = user32.GetWindowText(hWnd, strbTitle, strbTitle.Capacity + 1);
string strTitle = strbTitle.ToString();
if (user32.IsWindowVisible(hWnd) && string.IsNullOrEmpty(strTitle) == false)
{
collection.Add(strTitle);
}
return true;
};
if (user32.EnumDesktopWindows(IntPtr.Zero, filter, IntPtr.Zero))
{
foreach (var item in collection)
{
Console.WriteLine(item);
}
}
Console.Read();
}
}
Alternative Managed API:
Do you know one? Please contribute it!
