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→int iof_flag(..........)
==== int iof_flag(..........) ====
<big>int iof_flag(const char*'''format''', int '''row''', int '''col''', int *'''status''', int '''radio''');</big>
io_flag() allows the user to make a single true/false selection. '''"status"''' points to the status of the selection, that can be zero or non-zero. If '''"*status"''' is initially set to anything but zero, iof_flag() corrects value to one.'''"format"''' holds the shape of the checkbox as iof_displayflag() function.