private static Rectangle GetFrameRect(IntPtr hWnd)
{
Rectangle windowRect;
User32Interop.RECT rect;
User32Interop.POINT point = new User32Interop.POINT(0, 0);
User32Interop.WINDOWPLACEMENT wp = User32Interop.WINDOWPLACEMENT.Default;
// Get window border information
User32Interop.WINDOWINFO wi = new User32Interop.WINDOWINFO(null);
User32Interop.GetWindowInfo(hWnd, ref wi);
// Get window placement information (maximized, minimized, etc)
User32Interop.GetWindowPlacement(hWnd, out wp);
// Get window rectangle
User32Interop.GetWindowRect(hWnd, out rect);
if (wp.ShowCmd == User32Interop.ShowWindowCommands.Maximize)
{
rect.left += (int)wi.cxWindowBorders;
rect.top += (int)wi.cyWindowBorders;
rect.right -= (int)wi.cxWindowBorders;
rect.bottom -= (int)wi.cyWindowBorders;
windowRect = new Rectangle(rect.left, rect.top, rect.right, rect.bottom);
}
else
{
windowRect = new Rectangle(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top);
}
return(windowRect);
}
public bool RegisterNewInstance()
{
// Get guid of the executing assembly
Assembly assembly = Assembly.GetExecutingAssembly();
GuidAttribute guidAttribute = (GuidAttribute)assembly.GetCustomAttributes(typeof(GuidAttribute), true)[0];
string guid = guidAttribute.Value;
// Create mutext
this.mutex = new Mutex(false, guid);
// Register notify message
if (notifyInstanceMessage == 0)
{
notifyInstanceMessage = User32Interop.RegisterWindowMessage(notifyMessageName);
}
// Wait on the mutext, false return value means that another instance is running
if (!this.mutex.WaitOne(0, false))
{
if (notifyInstanceMessage != 0)
{
User32Interop.PostMessage((IntPtr)User32Interop.HWND_BROADCAST, notifyInstanceMessage, 0, 0);
}
return(false);
}
// Create a window to receive notifications
if (this.siWindow == null)
{
this.siWindow = new SIWindow(this);
}
return(true);
}
private static string GetText(IntPtr hWnd)
{
int length = (int)User32Interop.SendMessage(hWnd, User32Interop.WM_GETTEXTLENGTH, IntPtr.Zero, IntPtr.Zero);
StringBuilder sb = new StringBuilder(length + 1);
User32Interop.SendMessage(hWnd, User32Interop.WM_GETTEXT, (IntPtr)sb.Capacity, sb);
return(sb.ToString());
}
public IntPtr Find()
{
if (!this.isFinding)
{
return(IntPtr.Zero);
}
IntPtr hNewWnd;
User32Interop.POINT pt = new User32Interop.POINT();
if (false == User32Interop.GetCursorPos(out pt))
{
hNewWnd = IntPtr.Zero;
}
else
{
hNewWnd = User32Interop.WindowFromPoint(pt);
}
// Check if it is the previous handle
if (hNewWnd == this.hWnd)
{
Debug.WriteLine("WindowFinder Process: [Same]");
return(hNewWnd);
}
// Make sure the window does not belog to current process
if (hNewWnd != IntPtr.Zero)
{
uint processId;
User32Interop.GetWindowThreadProcessId(hNewWnd, out processId);
int currentProcessId = System.Diagnostics.Process.GetCurrentProcess().Id;
Debug.WriteLineIf(processId != 0,
"WindowFinder Process: " + Process.GetProcessById((int)processId).ProcessName);
if (processId == currentProcessId)
{
hNewWnd = IntPtr.Zero;
}
}
// Clear previous frame
if (this.hWnd != IntPtr.Zero)
{
DrawFrame(this.hWnd);
}
if (hNewWnd != IntPtr.Zero)
{
// Get window text
this.text = GetText(hNewWnd);
// Draw new frame
DrawFrame(hNewWnd);
}
else
{
this.text = string.Empty;
}
// Return new handle
this.hWnd = hNewWnd;
return(this.hWnd);
}
/// <summary>
/// Unregisters a hot key from the system.
/// </summary>
/// <param name="keys">The keys that are associated with the hot key.</param>
public void UnregisterHotKey(Keys hotKey)
{
lock (syncRoot) {
if (!this.registredKeys.ContainsKey(hotKey))
{
throw new ArgumentException("Specified hot key is not registered.");
}
int id = this.registredKeys[hotKey];
User32Interop.UnregisterHotKey(window.Handle, id);
this.registredKeys.Remove(hotKey);
}
}
/// <summary>
/// Registers a hot key in the system.
/// </summary>
/// <param name="keys">The keys that are associated with the hot key.</param>
public void RegisterHotKey(Keys hotKey)
{
lock (syncRoot) {
if (this.registredKeys.ContainsKey(hotKey))
{
throw new ArgumentException("Specified hot key already registered.");
}
this.currentId++;
this.registredKeys.Add(hotKey, this.currentId);
// register the hot key.
ModifierKeys modifiers;
Keys extractedKeys;
ExtractKeys(hotKey, out modifiers, out extractedKeys);
if (!User32Interop.RegisterHotKey(window.Handle, this.currentId, (uint)modifiers, (uint)extractedKeys))
{
throw new InvalidOperationException("Couldn’t register the hot key.", new Win32Exception());
}
}
}
private static void DrawFrame(IntPtr hWnd)
{
IntPtr hDC = User32Interop.GetWindowDC(hWnd);
if (hDC == IntPtr.Zero)
{
return;
}
try {
using (Graphics graphics = Graphics.FromHdc(hDC)) {
Rectangle rect = GetFrameRect(hWnd);
ControlPaint.DrawReversibleFrame(rect, frameColor, FrameStyle.Thick);
rect.Inflate(-2, -2);
ControlPaint.DrawReversibleFrame(rect, frameColor, FrameStyle.Thick);
}
}
finally {
User32Interop.ReleaseDC(hWnd, hDC);
}
}
private void Dispose(bool disposing)
{
// Check to see if Dispose has already been called.
if (!this.disposed)
{
// If disposing equals true, dispose all managed
// and unmanaged resources.
if (disposing)
{
// unregister all the registered hot keys.
foreach (var item in this.registredKeys)
{
User32Interop.UnregisterHotKey(window.Handle, item.Value);
}
this.registredKeys.Clear();
// dispose the inner native window.
window.Dispose();
}
// Note disposing has been done.
disposed = true;
}
}
