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private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if(e.KeyCode==上下左右)
{
DoSomething();
e.Handled = true;//加上这句
}
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyData == Keys.Left)
{
textBox1.Text = "abc123";
}
}