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Purpose |
Return a 16-byte (128-bit) Globally Unique Identifier
(GUID) or Universally Unique Identifier
(UUID) binary
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Syntax |
id$ = GUID$[()] id$ = GUID$(guidtext$) |
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Remarks |
The GUID$ function, with no parameter (or a null, zero-length string parameter) will return a new, unique 16-byte string GUID (Globally Unique Identifier). This GUID may be used as a new class identifier or an interface identifier, or for some other purpose where a unique identifier may be required, such as for a one-time encryption key. If guidtext$ is specified, GUID$ examines a text string, and converts the first standard format, human-readable GUID it finds, and returns a 16-byte binary string. This 16-byte string contains the internal GUID representation as a 128-bit data item. To be valid, the GUID string in guidtext$ string must contain exactly 32 hexadecimal digits, optionally delimited by spaces or hyphens, but which must be enclosed overall by curly braces. For example: "{01234567-89AB-CDEF-FEDC-BA9876543210}". The GUID$ function is the logical complement to the GUIDTXT$ function. |
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id$ |
The return string may be assigned to a dynamic string, or a fixed-length string of at least 16 bytes, or (typically) a GUID variable. See DIM for more information on creating GUID variables. |
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Restrictions |
If any errors are encountered, GUID$ returns a null (zero-length) string instead of the 16-byte GUID string. GUID$ can also be used in string equate assignments provided an explicit human-readable GUIDTXT$ argument string is assigned. For example: $AppGuid = GUID$("{01234567-89AB-CDEF-FEDC-BA9876543210}") |
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See also |
DIM, CLSID$, GUIDTXT$, How are GUID's used with objects?, INTERFACE (Direct), INTERFACE (IDBind), ISINTERFACE, ISNOTHING, ISOBJECT, Just what is COM?, LET (with Objects), OBJECT, OBJACTIVE, OBJPTR, OBJRESULT, PROGID$, What is an object, anyway? |
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Example |
DIM oID1 AS GUID, oID2 AS GUID oID1 = GUID$("{01234567-89AB-CDEF-FEDC-BA9876543210}") oID2 = GUID$("The GUID we need is shown as {0123456789ABCDEFFEDCBA9876543210}") |