(Type your message here)

--------------------------------
From: sombra negra

I'm using a VC++ dll in c#, I thing i know how to import functions with DLLIMPORT and use the callback but when i use a function of the dll that fired a callback  the code call to the function that manage the callbacks but when the code go out of this function the message System.NullReferenceException i run the program with out the callback and everything ok!!. Someone can help me please

this is the function that fire the callback

[DllImportAttribute("mydll.dll")] public static extern int cfm_start(sbyte system,uint acqui, ref IMAGE_STRUCT);

IMAGE_STRUCT is a struct that has two strcuts

public struct IMAGE_STRUCT
{
public IMAGE_MEM a;
public IMAGE_PAR b;
}

the important one is IMAGE_MEM that has a void *.


public struct IMAGE_MEM
{
public void* imagePtr
}

-----------------------
Posted by a user from .NET 247 (http://www.dotnet247.com/)

<Id>X2un0/MbFE+Ydh7h4CYGXw==</Id>

System.Reflection
How to dynamically load strong name assemblies
Protecting Assembly against disassembling...
Strong Typing of Primitive Types
Events & Delegates
streamreader halt
Process.Start - The requested lookup key was not found in any active activation context.
Checking whether "SomeString" is Directory or File...
simple confirmation on XML comments ...
Guru Challenge Request re Dynamic Scripts from Server