C# 回车登录有关问题

C# 回车登录问题
C#做的一个登录界面，输入用户名和密码之后，怎样按回车键就能登录呢？


[解决办法]
protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
{
if (msg.WParam.ToInt32() == (int)Keys.Enter)
{
switch (ActiveControl.Name)
{
case "button1": return true;
case "textBox1": return true;
return true;
}
}
return base.ProcessCmdKey(ref msg, keyData);
}
private void frmLogin_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if(e.KeyCode == Keys.Enter )
{
btn.PerformClick();
}
}