public void InstallHook(Form window)
{
if (this.State == HookState.Uninstalled)
{
if (window != null)
{
NativeExports.SetLastError(0);
IntPtr nextWindow = NativeExports.SetClipboardViewer(window.Handle);
if (nextWindow == IntPtr.Zero)
{
var errorCode = NativeExports.GetLastError();
if (errorCode == 0)
{
OnSuccessfullHook(window.Handle, nextWindow);
}
else
{
var message = ErrorCodeHelper.GetMessage(errorCode);
throw new Exception(message);
}
}
else
{
OnSuccessfullHook(window.Handle, nextWindow);
}
}
}
}
private void SafeRemove()
{
if (this.handle != IntPtr.Zero)
{
NativeExports.UnhookWindowsHookEx(this.handle);
this.OnSuccessfullUnhook();
}
}
private void SafeRemove()
{
if (this.State == HookState.Installed)
{
NativeExports.ChangeClipboardChain(this.clipboard.Handle, this.clipboard.NextWindow);
this.OnSuccessfullUnhook();
}
}
public void RemoveHook()
{
if (this.State == HookState.Installed)
{
if (NativeExports.UnhookWindowsHookEx(this.handle))
{
this.OnSuccessfullUnhook();
}
else
{
var errorCode = NativeExports.GetLastError();
throw new Exception(ErrorCodeHelper.GetMessage(errorCode));
}
}
}
public void InstallHook(Form window)
{
if (this.State == HookState.Uninstalled)
{
this.keyboardProcessor = new KeyboardMessageEventHandler(KeyboardProc);
this.handle = NativeExports.SetWindowsHookEx(NativeConstants.WH_KEYBOARD_LL, this.keyboardProcessor, IntPtr.Zero, 0);
if (this.handle == IntPtr.Zero)
{
this.keyboardProcessor = null;
var errorCode = NativeExports.GetLastError();
throw new Exception(ErrorCodeHelper.GetMessage(errorCode));
}
else
{
this.OnStateChanged(new StateChangedEventArgs(this.State));
}
}
}
public void RemoveHook()
{
if (this.State == HookState.Installed)
{
NativeExports.SetLastError(0);
NativeExports.ChangeClipboardChain(this.clipboard.Handle, this.clipboard.NextWindow);
var errorCode = NativeExports.GetLastError();
if (errorCode == 0)
{
this.OnSuccessfullUnhook();
}
else
{
var message = ErrorCodeHelper.GetMessage(errorCode);
throw new Exception(message);
}
}
}
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case NativeConstants.WM_DRAWCLIPBOARD:
{
if (ClipboardChanged != null)
{
ClipboardChanged(this, new ClipboardEventArgs(m.WParam));
}
NativeExports.SendMessage(this.nextWindow, (uint)m.Msg, m.WParam, m.LParam);
}
break;
case NativeConstants.WM_CHANGECBCHAIN:
{
if (m.WParam == this.nextWindow)
{
// The window is being removed is the next window on the clipboard chain.
// Change the ClipboardHook._nextWind handle with LParam.
// There is no need to pass this massage any farther.
this.nextWindow = m.LParam;
}
else
{
NativeExports.SendMessage(this.nextWindow, (uint)m.Msg, m.WParam, m.LParam);
}
}
break;
default:
{
if (m.Msg == NativeConstants.WM_DESTROY && WindowClosing != null)
{
WindowClosing(this, EventArgs.Empty);
}
base.WndProc(ref m);
}
break;
}
}
private IntPtr KeyboardProc(int nCode, IntPtr wParam, ref KeyboardData lParam)
{
if (nCode >= NativeConstants.HC_ACTION)
{
KeyboardEventArgs e;
var vkCode = (Keys)lParam.vkCode;
if ((int)wParam == NativeConstants.WM_KEYDOWN | (int)wParam == NativeConstants.WM_SYSKEYDOWN)
{
if (vkCode == Keys.LMenu | vkCode == Keys.RMenu)
{
this.keyData = (this.keyData | Keys.Alt);
e = new KeyboardEventArgs(this.keyData | Keys.Menu, vkCode);
}
else if (vkCode == Keys.LControlKey | vkCode == Keys.RControlKey)
{
this.keyData = (this.keyData | Keys.Control);
e = new KeyboardEventArgs(this.keyData | Keys.ControlKey, vkCode);
}
else if (vkCode == Keys.LShiftKey | vkCode == Keys.RShiftKey)
{
this.keyData = (this.keyData | Keys.Shift);
e = new KeyboardEventArgs(this.keyData | Keys.ShiftKey, vkCode);
}
else
{
e = new KeyboardEventArgs(this.keyData | vkCode, vkCode);
}
this.OnKeyDown(e);
if (e.Handled)
{
return(new IntPtr(1));
}
}
else if ((int)wParam == NativeConstants.WM_KEYUP | (int)wParam == NativeConstants.WM_SYSKEYUP)
{
if (vkCode == Keys.LMenu | vkCode == Keys.RMenu)
{
this.keyData = (this.keyData & ~Keys.Alt);
e = new KeyboardEventArgs(this.keyData | Keys.Menu, vkCode);
}
else if (vkCode == Keys.LControlKey | vkCode == Keys.RControlKey)
{
this.keyData = (this.keyData & ~Keys.Control);
e = new KeyboardEventArgs(this.keyData | Keys.ControlKey, vkCode);
}
else if (vkCode == Keys.LShiftKey | vkCode == Keys.RShiftKey)
{
this.keyData = (this.keyData & ~Keys.Shift);
e = new KeyboardEventArgs(this.keyData | Keys.ShiftKey, vkCode);
}
else
{
e = new KeyboardEventArgs(this.keyData | vkCode, vkCode);
}
this.OnKeyUp(e);
if (e.Handled)
{
return(new IntPtr(1));
}
}
}
return(NativeExports.CallNextHookEx(this.handle, nCode, wParam, ref lParam));
}
