弹出窗口杀手（下）

注册系统热键 系统热键用在像弹出窗口杀手这种应用程序非常有用, Ctrl+Shift+J是缺省热键.   说道实现,我们继续用RegisterHotkey(HWND hWnd, int id, UINT fsModifiers, UINT vkey). 完成,代码如下:

public void SetHotKey(Keys c, bool bCtrl, bool bShift, bool bAlt, bool bWindows) {     m_hotkey = c;     m_ctrlhotkey = bCtrl;     m_shifthotkey = bShift;     m_althotkey = bAlt;     m_winhotkey = bWindows;       // update hotkey     NativeWIN32.KeyModifiers modifiers = NativeWIN32.KeyModifiers.None;     if (m_ctrlhotkey)         modifiers |= NativeWIN32.KeyModifiers.Control;     if (m_shifthotkey)         modifiers |= NativeWIN32.KeyModifiers.Shift;     if (m_althotkey)         modifiers |= NativeWIN32.KeyModifiers.Alt;     if (m_winhotkey)         modifiers |= NativeWIN32.KeyModifiers.Windows;       NativeWIN32.RegisterHotKey(Handle, 100, modifiers, m_hotkey); //Keys.J); } 一般的,注册热键要一下几步

/* ------- using HOTKEYs in a C# application -------      -- code snippet by James J Thompson --   在Form的load 中 : Ctrl+Shift+J            bool success = RegisterHotKey(Handle,                                       100,                                       KeyModifiers.Control | KeyModifiers.Shift,                                       Keys.J);      在 form的closing中 :            UnregisterHotKey(Handle, 100);      如何处理热键 :        protected override void WndProc( ref Message m )      {            const int WM_HOTKEY = 0x0312;                         switch(m.Msg)               {                    case WM_HOTKEY:                                                             MessageBox.Show("Hotkey pressed");                               ProcessHotkey();                    break;               }                  base.WndProc(ref m );      }     public class NativeWIN32 {     [DllImport("user32.dll", SetLastError=true)]     public static extern bool RegisterHotKey( IntPtr hWnd, // handle to window                                                  int id, // hot key identifier                                                  KeyModifiers fsModifiers,  // key-modifier options                                                  Keys vk            // virtual-key code        );                      [DllImport("user32.dll", SetLastError=true)]     public static extern bool UnregisterHotKey( IntPtr hWnd, // handle to window                                                    int id      // hot key identifier        );       [Flags()]     public enum KeyModifiers     {          None = 0,         Alt = 1,            Control = 2,            Shift = 4,            Windows = 8     }   }   ------- using HOTKEYs in a C# application ------- */   当我们按下热键以后,流程是这样:首先用HWND GetForegroundWindow()来得到窗体,然后要抓出窗体的标题, GetWindowText(HWND hwnd, /*out*/LPTSTR lpString, int nMaxCount). 具体如下:

 

protected void ProcessHotkey() {     IntPtr hwnd = NativeWIN32.GetForegroundWindow();     if (!hwnd.Equals(IntPtr.Zero))     {         NativeWIN32.STRINGBUFFER sWindowTitle;         NativeWIN32.GetWindowText(hwnd, out sWindowTitle, 256);           if (sWindowTitle.szText.Length>0)             AddWindowTitle( sWindowTitle.szText ); // add to the ListView (Form)     } }  

代码下载: http://www.codeproject.com/useritems/popupkiller/popupkiller_src_update.zip

演示程序: http://www.codeproject.com/useritems/popupkiller/popupkiller_demo_update.zip

转载于:https://www.cnblogs.com/tuyile006/archive/2007/11/04/949212.html