Can I call a function from Exe in the injected function of the dll ?

[wdw753951]

I am new to learn the hook, I have a question For example I know the address

typedef DWORD(*calcTextCharLengh_type)(char*, DWORD*);

myfun is my hook function
void myfun(){

    calcTextCharLengh_type calcTextCharLength = reinterpret_cast<calcTextCharLengh_type>(0x410C20);
    calcTextCharLength(xxx,xxx);
}

//when hook Successfully，the exe crash in this call, how can I call the exe's function