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);
}
}
当我在活动窗口之间切换时,我得到了回调 但是当我最大化最小化窗口时,我没有收到回电,
我找到了解决这个问题的工作,但我正在寻求更好的解决方案
任何帮助将不胜感激。
答案 0 :(得分:5)
当我在活动窗口之间切换时,我得到回调但是当我最大化最小化窗口时,我没有得到回叫
是的,您需要使用EVENT_SYSTEM_MINIMIZESTART
或EVENT_SYSTEM_MINIMIZEEND
event constant来接收最小化窗口对象的通知。
使用SetWinEventHook
function的eventMin
和eventMax
参数表示您有兴趣接收其中一项和 {{1}的通知}}