C# 如何知道前景窗口何时更改
我正在用c#编写一个应用程序,我需要知道地面窗口的设置何时更改 我使用了SetWindowsHookEx,但在两个窗口之间切换时没有回拨 我的代码:C# 如何知道前景窗口何时更改,c#,hook,setwindowshookex,C#,Hook,Setwindowshookex,我正在用c#编写一个应用程序,我需要知道地面窗口的设置何时更改 我使用了SetWindowsHookEx,但在两个窗口之间切换时没有回拨 我的代码: private const int WH_CALLWNDPROC = 4; private delegate IntPtr windowName(int nCode, IntPtr wParam, IntPtr lParam); private static windowName _name = HookCallback; private sta
private const int WH_CALLWNDPROC = 4;
private delegate IntPtr windowName(int nCode, IntPtr wParam, IntPtr lParam);
private static windowName _name = HookCallback;
private static IntPtr _hook = IntPtr.Zero;
public static void start()
{
_hook = SetHook(_name);
Application.Run();
UnhookWindowsHookEx(_hook);
}
private static IntPtr SetHook(windowName proc)
{
using (Process curProcess = Process.GetCurrentProcess())
using (ProcessModule curModule = curProcess.MainModule)
{
return SetWindowsHookEx(WH_CALLWNDPROC, proc, GetModuleHandle(curModule.ModuleName), 0);
}
}
private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
browser = GetActiveWindow();
Console.WriteLine(browser);
return CallNextHookEx(_hook, nCode, wParam, lParam);
}
好的,我有一个答案
public static void start()
{
WinEventDelegate dele = new WinEventDelegate(WinEventProc);
IntPtr m_hhook = SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, dele, 0, 0, WINEVENT_OUTOFCONTEXT);
string window = GetActiveWindowTitle();
Console.WriteLine(window);
while (true)
{
if (window != GetActiveWindowTitle())
{
window = GetActiveWindowTitle();
Console.WriteLine(window);
}
}
}
delegate void WinEventDelegate(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime);
private static string GetActiveWindowTitle()
{
const int nChars = 256;
IntPtr handle = IntPtr.Zero;
StringBuilder Buff = new StringBuilder(nChars);
handle = GetForegroundWindow();
if (GetWindowText(handle, Buff, nChars) > 0)
{
return Buff.ToString();
}
return null;
}
public static void WinEventProc(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
{
Console.WriteLine(GetActiveWindowTitle());
}
#region imports
[DllImport("user32.dll")]
static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags);
private const uint WINEVENT_OUTOFCONTEXT = 0;
private const uint EVENT_SYSTEM_FOREGROUND = 3;
[DllImport("user32.dll")]
static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll")]
static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);
#endregion
这有点混乱,但它可以工作您根本没有检查错误,所以您不知道它为什么不能工作。不能像在C#中使用的那样设置全局钩子。或者您应该使用的WH_SHELL。它需要在每个进程中注入DLL,而不能注入托管代码。检查此项目:此代码适用于键盘或鼠标事件我在过程中确实使用了DLL,但我不知道如何为forground窗口实现它