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POWindows Callback, When The Active Window Changed
 

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    <pre><code>public class ActiveWindow { public delegate void ActiveWindowChangedHandler(object sender, String windowHeader,IntPtr hwnd); public event ActiveWindowChangedHandler ActiveWindowChanged; [DllImport("user32.dll")] static extern IntPtr GetForegroundWindow(); [DllImport("user32.dll")] static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count); delegate void WinEventDelegate(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime); const uint WINEVENT_OUTOFCONTEXT = 0; const uint EVENT_SYSTEM_FOREGROUND = 3; [DllImport("user32.dll")] static extern bool UnhookWinEvent(IntPtr hWinEventHook); [DllImport("user32.dll")] static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags); IntPtr m_hhook; private WinEventDelegate _winEventProc; public ActiveWindow() { _winEventProc = new WinEventDelegate(WinEventProc); m_hhook = SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, _winEventProc, 0, 0, WINEVENT_OUTOFCONTEXT); } void WinEventProc(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime) { if (eventType == EVENT_SYSTEM_FOREGROUND) { if (ActiveWindowChanged != null) ActiveWindowChanged(this,GetActiveWindowTitle(hwnd),hwnd); } } private string GetActiveWindowTitle(IntPtr hwnd) { StringBuilder Buff = new StringBuilder(500); GetWindowText(hwnd, Buff, Buff.Capacity); return Buff.ToString(); } ~ActiveWindow() { UnhookWinEvent(m_hhook); } } </code></pre> <p>when i switch between the active windows i get the callback but when i maximize a minimized window i don't get a call back,</p> <p>i find a work throw to solve this problem, but i am seeking for better solution</p> <p>any help will be appreciated.</p>
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