mixing managed code with native code

[rhossi]

I have an Assembly using IJW that uses a third party native library.
There are quite a few function calls that uses callbacks and pointers.

One of those takes a delegate: bool enumXXX(char * someData, unsigned
long lparam);

Inside the passed delegate I need to cast from unsigned long to
List<String^^. How Can I do this ?

Thanks,

Felipe Garcia

[Ben Voigt]

"rhossi" <fe*******@gmail.comwrote in message
news:11**********************@11g2000cwr.googlegro ups.com...

>I have an Assembly using IJW that uses a third party native library.
There are quite a few function calls that uses callbacks and pointers.

One of those takes a delegate: bool enumXXX(char * someData, unsigned
long lparam);

Inside the passed delegate I need to cast from unsigned long to
List<String^^. How Can I do this ?

You can't pass a tracking handle/reference through a native API, because the
GC could move it meanwhile. Use a pinned pointer instead.

Note that your code won't be 64-bit clean if it uses an unsigned long
variable to hold a pointer.

>
Thanks,

Felipe Garcia