I am doing something with an Win API
//lock the controls on a Winform
Utilities.DllImportsHelper.LockWindowUpdate(this.Handle.ToInt32());
///code goes here
//unlock the controls
Utilities.DllImportsHelper.LockWindowUpdate(0);


//Utilities class
using System.Runtime.InteropServices;

[DllImport("user32.dll")]
public static extern int LockWindowUpdate(int hwndLock);

Hope it helps