Problem:

The following CALL crashes with a runtime error 114.

"GetParameter" is a C-function in a DLL created by Visual C .

01 buffer pic x(32000).

01 len binary-long value 32000.

CALL WinApi "GetParameter"

    using by reference buffer

             by value len

Resolution:

For modifying a buffer with this kind of DLL, it requires a pointer to a buffer.

01 buffer pic x(32000).

01 len usage binary-long value 32000.

01 ptr usage pointer.

SET ptr TO ADDRESS buffer.

CALL WinApi "GetParameter"

    using by reference ptr

             by value len

In a C program buffer might be specified as char **buffer;