C#调用C的DLL

/**//*==C==*/

__declspec(dllexport) long __stdcall
PrintMsg(char* name)
...{
    if (name == NULL)
        return -1;
    printf("Hello,%s",name);
    return 0;
} 

Complile ==> test1.dll

/**//*==C#==*/

class Program
    ...{
        //调用C DLL 中的函数
        [DllImport("test1.dll",EntryPoint="PrintMsg",CharSet=CharSet.Ansi,
           CallingConvention = CallingConvention.StdCall)]
        public static extern void PrintMsg(char[] name);
        static void Main(string[] args)
        ...{
            char[] name = "ZestA".ToCharArray();
            PrintMsg(name);

            Console.Read();
        }
    }