Be careful when using POINTER_32 values in code that may be compiled as 64-bit code. The compiler will sign-extend the pointer when it is assigned to a native pointer in 64-bit code, not zero-extend the pointer. Be careful when using POINTER_64 values in code that may be compiled as 32-bit code. The compiler will sign-extend the pointer in 32-bit code, not zero-extend the pointer.
关于
zero-extend : 0扩展
sign-extend : 符号拓展
