BBC BASIC for Windows
« Callback function address »
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Yes, that's correct (the '1' specifies the number of parameters the callback function expects).
Bear in mind that if you use callbacks you should avoid 'blocking' statements in your program, such as INPUT, GET and WAIT (with a non-zero parameter). If necessary the NOWAIT library provides non-blocking replacements for these.
Please also note that SYS itself can be a blocking function so if your callback needs to happen during a SYS call you must use the special non-blocking version FN_syscalln() provided in the CALLBACK library.
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