C++ uninitialized local variable

Question

I have a function:

VOID GetOSVersion(PDWORD major, PDWORD minor, PDWORD build)
{
    OSVERSIONINFO osver;
    ZeroMemory(&osver, sizeof(OSVERSIONINFO));
         


        

Answer 1

Those are pointers. They are not pointing at any memory you have allocated. They do not get "filled" in the function, they get used to access (uninitialized) memory.