public IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam) { bool fEatKeyStroke = false; var wparamTyped = wParam.ToInt32(); if (Enum.IsDefined(typeof(KeyboardState), wparamTyped)) { object o = Marshal.PtrToStructure(lParam, typeof(LowLevelKeyboardInputEvent)); LowLevelKeyboardInputEvent p = (LowLevelKeyboardInputEvent)o; var eventArguments = new GlobalKeyboardHookEventArgs(p, (KeyboardState)wparamTyped); EventHandler <GlobalKeyboardHookEventArgs> handler = KeyboardPressed; handler?.Invoke(this, eventArguments); fEatKeyStroke = eventArguments.Handled; } return(fEatKeyStroke ? (IntPtr)1 : CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam)); }
private void OnKeyPressed(object sender, GlobalKeyboardHookEventArgs e) { //Debug.WriteLine(e.KeyboardData.VirtualCode); if (e.KeyboardData.VirtualCode != GlobalKeyboardHook.VkSnapshot) { return; } // seems, not needed in the life. //if (e.KeyboardState == GlobalKeyboardHook.KeyboardState.SysKeyDown && // e.KeyboardData.Flags == GlobalKeyboardHook.LlkhfAltdown) //{ // MessageBox.Show("Alt + Print Screen"); // e.Handled = true; //} //else if (e.KeyboardState == GlobalKeyboardHook.KeyboardState.KeyDown) { MessageBox.Show("Print Screen"); e.Handled = true; } }