// handles the hook event
private void CbtHookInvoked(object sender, HookEventArgs e)
{
// handle hook events (only a few of available actions)
switch ((CbtHookAction)e.code)
{
case CbtHookAction.HCBT_CREATEWND:
HandleCreateWndEvent(e.wParam, e.lParam);
break;
case CbtHookAction.HCBT_DESTROYWND:
HandleDestroyWndEvent(e.wParam, e.lParam);
break;
case CbtHookAction.HCBT_ACTIVATE:
HandleActivateEvent(e.wParam, e.lParam);
break;
}
return;
}
// default hook filter function
internal int CoreHookProc(int code, IntPtr wParam, IntPtr lParam)
{
if (code < 0)
return CallNextHookEx(hHook, code, wParam, lParam);
// let clients determine what to do
HookEventArgs e = new HookEventArgs(code, wParam, lParam);
OnHookInvoke(e);
// yield to the next hook in the chain
return CallNextHookEx(hHook, code, wParam, lParam);
}
internal void OnHookInvoke(HookEventArgs e)
{
if (HookInvoke != null)
HookInvoke(this, e);
}
// handles the hook event
private void WndProcRetHookInvoked(object sender, HookEventArgs e)
{
WndProcRetEventArgs wpe = new WndProcRetEventArgs(e.wParam, e.lParam);
if ((hWndHooked == IntPtr.Zero || wpe.cw.hwnd == hWndHooked) && WndProcRet != null)
WndProcRet(this, wpe);
return;
}
