{"height":"190","url":"https://chaipa.hateblo.jp/entry/20070223/1172232817","categories":["VB-TIPS"],"image_url":null,"provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/chaichanPaPa/","blog_title":"\u65e7\u71c8\u660e\u65e5\u8a18","description":"VB6\u3067\u306evbNullString\u3001Null\u3001vbNullChar\u3001vbNull\u3001Empty\u3001\u7a7a\u6587\u5b57\u5217\u306b\u3064\u3044\u3066 \u300avbNullString\u300b \u30fb\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u6587\u5b57\u5217\u3092\u793a\u3059\u3002\u3044\u308f\u3086\u308b null pointer\u3002 \u30fb\u53ef\u5909\u9577\u6587\u5b57\u5217\u578b\u3001\u3059\u306a\u308f\u3061String\u578b\u306e\u521d\u671f\u5024\u3002 \u30fbStrPtr(vbNullString) \u306f 0 \u3092\u8fd4\u3059\u3002 \u30fbVarType(vbNullString) \u306f vbString \u3092\u8fd4\u3059\u3002 \u30fbCBool(\"\" = vbNullString) \u306f True \u3068\u306a\u308b\u3002 \u30fb\u4e3b\u306bAPI\u547c\u3073\u51fa\u3057\u6642\u306b\u3001null pointer \u3092\u6e21\u3059\u610f\u56f3\u306a\u3069\u3067\u7528\u3044\u3089\u308c\u308b\u3002 \u300aNull\u300b \u30fb\u4e3b\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u3001\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchaipa.hateblo.jp%2Fentry%2F20070223%2F1172232817\" title=\" VB6\u3067\u306evbNullString\u3001Null\u3001vbNullChar\u3001vbNull\u3001Empty\u3001\u7a7a\u6587\u5b57\u5217\u306b\u3064\u3044\u3066 - \u65e7\u71c8\u660e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","title":" VB6\u3067\u306evbNullString\u3001Null\u3001vbNullChar\u3001vbNull\u3001Empty\u3001\u7a7a\u6587\u5b57\u5217\u306b\u3064\u3044\u3066","width":"100%","author_name":"chaichanPaPa","version":"1.0","published":"2007-02-23 21:13:37","blog_url":"https://chaipa.hateblo.jp/","type":"rich"}