Pedro, have a look at Plug-ins and cast exceptions [^]. Martin

ouh... this becomes really complicated. To solve this particular issue, I would suggest to add an eventhandler in your form. this.VisibleChanged += new EventHandler(Form1_VisibleChanged); Here you can show/hide the dialog according to the actual form's Visible state. My solution is a sledgehammer method to get all running form objects - without having any idea of your application logic. Maybe you will run run into similar issues with other forms/controls. At this point you might consider implementing Stefan's solution and storing your forms references in a central list? btw: if *all* app's windows (incl. dialogs) were hidden... how to bring them back? regards Martin

oops, I'm using VS 2003 so I can't check that... As I said, it's a quick & dirty way;). Creating a Forms.Control object from a handle seems to work for some other UI controls (i.e. ToolStripDropDownMenu) that respond to EnumWindows(). However, try to replace the line Control hForm = System.Windows.Forms.Control.FromHandle(hWnd); with this one: System.Windows.Forms.Form hForm = System.Windows.Forms.Control.FromHandle(hWnd) as System.Windows.Forms.Form; in order to get forms only. hope that helps Martin

a quick and dirty way::) using System; using System.Runtime.InteropServices; using System.Windows.Forms; public class GetFormsCollection { private delegate bool WndEnumProc(System.IntPtr hWnd , int lParam); [DllImport("user32.dll", CharSet=CharSet.Auto)] private static extern bool EnumWindows (WndEnumProc lpEnumFunc, int lParam); public readonly System.Collections.ArrayList Forms; public GetFormsCollection() { Forms = new System.Collections.ArrayList(); EnumWindows(new WndEnumProc(EnumCallback), 0); } private bool EnumCallback(System.IntPtr hWnd, int lParam) { Control hForm = System.Windows.Forms.Control.FromHandle(hWnd); // hForm is null for handles not created by your app... if (hForm != null) this.Forms.Add(hForm); return true; } public static void SetVisiblity(bool fVisible) { foreach (System.Windows.Forms.Form objForm in new GetFormsCollection().Forms) { objForm.Visible = fVisible; } } } Martin

take a look at System.Globalization.DateTimeFormatInfo.CurrentInfo.MonthNames see http://msdn2.microsoft.com/en-us/library/system.globalization.datetimeformatinfo.monthnames.aspx for details Hope that helps Martin