_MEMEXISTS - mkilgore/QB64pe GitHub Wiki

The _MEMEXISTS function returns true (-1) if the memory block variable name specified exists in memory and false (0) if it does not.

result = _MEMEXISTS(memBlock)

• The memBlock variable name must have been created using DIM memBlock AS _MEM type (DIM.
• The function verifies that the memory variable exists in memory before using a passed block, to avoid generating QB64 errors.
• Typically, this function is used by a LIBRARY SUB or FUNCTION which accepts a _MEM structure as input, to avoid an error.

See Also:

• _MEM (function)
• _MEMELEMENT, _MEMCOPY
• _MEMIMAGE, _MEMNEW
• _MEMGET, _MEMPUT
• _MEMFILL, _MEMFREE

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