Question

C#如何在keydown事件里判断按下的是左shift还是右shift

Answer 1

    public partial class Form1 : Form
    {
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        private static extern short GetAsyncKeyState(Keys vKey);
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.ShiftKey)
            {
                if (Convert.ToBoolean(GetAsyncKeyState(Keys.LShiftKey)))
                    MessageBox.Show("Left");
                if (Convert.ToBoolean(GetAsyncKeyState(Keys.RShiftKey)))
                    MessageBox.Show("Right");
            }
        }
    }