重载Form的ProcessDialogKey

protected override bool ProcessDialogKey(System.Windows.Forms.Keys  aKey)
{
if (aKey == Keys.Enter)
{

SendKeys.Send("{TAB}");
return true;

}
base.ProcessDialogKey(aKey);
return false;
}

方法2：

1.设置窗口的KeyPreview=true;

2.参考如下代码
private void dlgLogon_KeyPress(object sender, system.Windows.Forms.KeyPressEventArgs e)
  {
   if(e.KeyChar == (char)13)
    this.SelectNextControl(this.ActiveControl,true,true,false,false);

  }