Question

如何获得前景窗口的键盘状态？我搜索过但没有帮助

[DllImport("user32.dll")]
public static extern bool GetKeyboardState(byte[] lpKeyState);

获取当前应用程序键盘状态而不是外部窗口（活动窗口）

更新我做了像slashy说的但是仍然什么都没有，但是什么时候我知道什么都没有，所以任何人都可以告诉我这个代码有什么不对

 public static char GetCharFromKey(Key key)
        {
            char ch = ' ';

            int virtualKey = KeyInterop.VirtualKeyFromKey(key);


            uint x = GetWindowThreadProcessId(GetForegroundWindow(), IntPtr.Zero);


            uint scanCode = MapVirtualKey((uint)virtualKey, MapType.MAPVK_VK_TO_VSC);

            StringBuilder stringBuilder = new StringBuilder(2);

            int result = ToUnicode((uint)virtualKey, scanCode, Encoding.ASCII.GetBytes(GetKeyboardLayout(x).ToString()), stringBuilder, stringBuilder.Capacity, 0);

            switch (result)
            {
                case -1:
                    break;
                case 0:
                    break;
                case 1:
                    {
                        ch = stringBuilder[0];
                        break;
                    }
                default:
                    {
                        ch = stringBuilder[0];
                        break;
                    }
            }

            return ch;
        }

仍然让我的应用程序键盘状态不是前景

Answer 1

首先应该获取窗口处理程序，然后找到键盘状态：

Dll导入

    [DllImport("user32.dll")]
    private static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll")]
    static extern uint GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);
    [DllImport("user32.dll")]
    static extern IntPtr GetKeyboardLayout(uint idThread);

代码：

uint x = GetWindowThreadProcessId(GetForegroundWindow(), IntPtr.Zero);

  keyboard = GetKeyboardLayout(x).ToString();//holds the state

前景窗口的GetKeyboardState

1 个答案: