如何查SendMessage按键消息的键值？

[xiaohefeng]

1、发送鼠标消息如下：
private const int WM_LBUTTONDOWN = 513; // 0x0201
private const int WM_LBUTTONUP = 514; // 0x0202

[System.Runtime.InteropServices.DllImport("user32.dll")]
static extern bool SendMessage(IntPtr hWnd, Int32 msg, Int32 wParam, Int32 lParam);

private void SetNoCurrentCell()
{
//click on top left corner of the grid
SendMessage( this.dataEditGrid.Handle, WM_LBUTTONDOWN, 0, 0);
SendMessage( this.dataEditGrid.Handle, WM_LBUTTONUP, 0, 0);
}

2、问题
我想发送回车键，怎么写？
在帮助里找windows message number找不到，能否给个帮助地址？
thanks!!