526互联

OLEVariant

olevariant序列

olevariant序列 /// <author>cxg 2020-12-31</author> unit yn.variant; interface uses classes, zlib, Variants, SysUtils; {$IFNDEF UNICODE} type RawByteStri ......
序列 olevariant

Delphi Variant 通用类型[5] OLEVariant 的空值判定和释放

Delphi Variant 通用类型[5] OLEVariant 的空值判定和释放 1、OLEVariant 的空值判定 var v: OLEVariant; begin v := 'TaoRoy 2023'; if VarIsEmpty(v) or VarIsNull(v) then ShowM ......
OLEVariant Variant 类型 Delphi
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