C++ - Adding integer to pointer issue

I'm trying to simply add an integer to a pointer, and the compiler continues to force multiplying the integer by 2, then adding it. I assume the compiler is automating the pointer arithmetic, but it's causing issues

Code:

char *Char1 = "Test123456789";
int new_int = 2;

char *Char2 = (char*)(Char1+new_int);

MessageBoxA(0,Char2,0,0);

In this example, Char2 points to "123456789", when I want it to point to "st123456789". The compiler is deciding to multiply new_int by 2 before adding it to Char1

I also tried:

char *Char2 = &Char1[new_int];

With the same problem...

Compiler is Microsoft Visual Studio 6