Listening to another window resize events in C#

Question

I am implementing a small application (observer) that needs to \"attach\" itself to the bottom of another window (observed). The latter is not a window inside the applicatio

Answer 1

I suggest you use WinEvents:

public delegate void WinEventDelegate(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime);

    [DllImport("user32.dll")]
    public static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags);

See also:event hooks