DLL Implementation in C# WPF

Thanks for your respond SAKryukov. The DLL is not a .NET assembly. I am using DllImport for function pointers. At this time below is all I got. However I still need to add a C# equivlent of HINSTANCE and loadlibrary
(in C++ it is :HINSTANCE hDll = LoadLibrary("HINSTANCE hDll = LoadLibrary("supertim.dll");.dll"))
to bound the control to my dll. I don't know how to achieve that in C#. The other thing I need to do is to get the Handle that the control is bound to and send it through InitTimerDll() function. I appreciate your help.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Interop;
using System.Runtime.InteropServices;


namespace WpfApplication1
{
class myDLL_DLL_Interface
{

struct dll_init_params { ushort simp; ushort simt;}
[DllImport("myDll.dll")]
public static extern void InitTimerDll("Handle", ref dll_init_params InitParams);
[DllImport("myDll.dll")]
public static extern void TerminateTimerDll();
[DllImport("myDll.dll")]
public static extern void ProberOnLine(ushort i);
[DllImport("myDll.dll")]
public static extern bool StageZmove(ushort die, ushort dir);
[DllImport("myDll.dll")]
public static extern int StageZPosition();
[DllImport("myDll.dll")]
public static extern bool StageToLoad(ushort die);
[DllImport("myDll.dll")]
public static extern bool StageGoTo(ushort die, long x, long y);
[DllImport("myDll.dll")]
public static extern void SetCounterX(ushort x);
[DllImport("myDll.dll")]
public static extern void SetCounterY(ushort y);
[DllImport("myDll.dll")]
public static extern bool Contact();
[DllImport("myDll.dll")]
public static extern void StartDelayInking();


}
}