Question

I’m trying to write a REG_MULTI_SZ value to the Windows Registry using C++. Where I’m stuck is on converting the c-strings that I have to MULTI_SZ format. Is there a convenient way to do this?

Answer 1

You’ll have to do it yourself. Given

char ** strings; // array of strings
int N; // number of strings

you count the length of the multi_sz

int len=1;
for(int i=0; i<N; i++)
  len += strlen(strings[i])+1;

and fill it

char* multi_sz = malloc(len), ptr=multi_sz;
memset(multi_sz, 0, len);
for(int i=0; i<N; i++) {
  strcpy(ptr, strings[i]);
  ptr += strlen(strings[i])+1;
}