A question about call dll in c#

[Beareye]

there is a function in UA2011.dll :

void stdcall read_201(HANDLE h201, short *addat, unsigned long leng)
Now I write this code in c# like this:
Class Uac:
[DllImport ("UA200.DLL") ]
public static extern void read_201(int h201, IntPtr addat,long
leng);
I use read_201 to collect data,and then put into addat array:
IntPtr addat;
int result=Uac.OpenUA201(); // open handle
Uac.Start(result,0,8,2000,0); //init
Uac.read_201(result,addat,32);
but I got an error that I use a parameter not evaluated. I am not sure
how to use IntPtr addat,
who can tell me?thank you

[Mattias Sjögren]

>[DllImport ("UA200.DLL") ]

public static extern void read_201(int h201, IntPtr addat,long
leng);

The last parameter shoud be of type int in C#.

Can't you make the addat parameter a ref short or short[] depending on
how it's used?

Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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[Beareye]

ref short[] or out short[] ?

[Mattias Sjögren]

ref short[] or out short[] ?

Neither, just short[] passed by value.
Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

[Beareye]

thanks very much,It's working