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Get IntPtr for a byte array

I have a third party Dll with a function which requires an IntPtr but the
data is in a byte array. I need to get the IntPtr for this byte array so I
can pass it into the function.

Thanks in advance,
~Logan
Nov 15 '05 #1
2 29611
Logan,
I found the answer,
use GCHandle, code sample follows
----------------------------------------------------------------------------
-------------
//b is the byte array
//ToSend is an IntPtr that is set to the address of b
GCHandle gch = GCHandle.Alloc( b,GCHandleType. Pinned);
ToSend = gch.AddrOfPinne dObject();
----------------------------------------------------------------------------
-------------


Just don't forget to Free the GCHandle when you're done with it.

Another possible solution is to change the DLL function declaration to
take a byte array parameter instead of an IntPtr.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/
Please reply only to the newsgroup.
Nov 15 '05 #2
try the fixed statement

fixed (byte *p=ByteArray) {
IntPtr MyIntPtr= (IntPtr)p;
SomeDllMethod(M yIntPtr);
}

don't forget to use /unsafe when compiling

Oscar

"Logan McKinley" <lo***@globalwe b.net> wrote in message
news:uc******** *****@tk2msftng p13.phx.gbl...
I have a third party Dll with a function which requires an IntPtr but the
data is in a byte array. I need to get the IntPtr for this byte array so I can pass it into the function.

Thanks in advance,
~Logan

Nov 15 '05 #3

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