Declarations

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API Functions expect input strings to be zero-terminated
- Use Format4 Z’abcd’ literal constants
- Use STRING instruction to append binary zeroes before passing a string to the function:
```
STRING I-PASSWORD DELIMITED BY SPACES X'00' DELIMITED BY SIZE INTO W-PASSWORD
```
Numbers are usually 32-bit signed integers unless differently specified
```
02 W-RETURN PIC S9(8) USAGE BINARY
```
Passing parameters to the APIs
Every time a parameter name is preceded by an asterisk in the function prototype, this means that the API expects to receive a pointer to the specified parameter, so the Cobol verb BY REFERENCE should be used.

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