The first thing I can tell from looking at your code is that it's C++/CLI rather than "just" C++. So you should rather post your question in the Managed C++ and C++/CLI forum (unless a moderator is faster and moves the entire thread over there).

And when you do so, please use code tags which will significatly improve the readability of your code.

See you over there...

Ah, and... welcome to CodeGuru!