Is any other way to compare 2 TGUID elements, except transform them into strings (the guidtostring function) and after evaluate the expression, in Delphi 7?
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You can use IsEqualGUID API declared in SysUtils.
IsEqualGUID() (or IsEqualIID()), like TOndrej suggested. You can also use SysUtuils. CompareMem() instead, since TGuid is a binary array of bytes.