C#

using System.Runtime.InteropServices;
...
public enum HookType : int
{
     WH_JOURNALRECORD = 0,
     WH_JOURNALPLAYBACK = 1,
     WH_KEYBOARD = 2,
     WH_GETMESSAGE = 3,
     WH_CALLWNDPROC = 4,
     WH_CBT = 5,
     WH_SYSMSGFILTER = 6,
     WH_MOUSE = 7,
     WH_HARDWARE = 8,
     WH_DEBUG = 9,
     WH_SHELL = 10,
     WH_FOREGROUNDIDLE = 11,
     WH_CALLWNDPROCRET = 12,    
     WH_KEYBOARD_LL = 13,
     WH_MOUSE_LL = 14
}

delegate int HookProc(int code, IntPtr wParam, IntPtr lParam);

ImprortDll["user32"]
public static extern IntPtr SetWindowsHookEx(HookType idHook, HookProc lpfn, IntPtr hMod, uint dwThreadId);

SqlConnection dataConnection = new SqlConnection();
SqlCommand dataCommand = new SqlCommand();
dataConnection.Open();
dataCommand.Connection = dataConnection;
dataCommand.Transaction = dataConnection.BeginTransaction();


//use dataCommand.Transaction.Commit() 
//use dataCommand.Transaction.Rollback()

tableLayoutPanel1.GetChildAtPoint(p)