使用C扩展Go编程语言，转换数据类型

How can I convert data types from c to go and vice-versa?

For example, I have a function that returns an array of integers:

char* Test()
{
    char*msg = "Hello, Go";
    return msg;
}

How can I convert it to slice or array?

--UPDATE--

In Go file, I can use C.GoString(C.Test()) to convert the return type to Go String. I'm looking for a complete doc for these functions.

You should have a look at http://golang.org/cmd/cgo/ . Here's an example using it http://golang.org/misc/cgo/gmp/gmp.go