C-Library and STRING-Parameters

[DSMan195276]

To pass a string to a function in C you have it take a `char *` parameter. In concept this is similar to a by-ref pass in QB64, you're given a pointer to the string contents rather than a copy of the string contents. A `String` parameter in `Declare Library` is the same, a by-ref pass will pass the `String` as a `char *` to the C function. Note that C is expecting the string to be NUL terminated, QB64 string's are not so you'll have to add the NUL yourself.

You're not allowed to pass a char array by-value to a C function, so as a consequence you can't pass a `String` by-value to a C function either.