{"id":97192,"date":"2024-03-21T21:43:55","date_gmt":"2024-03-21T12:43:55","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mfc%e3%81%aecolevariant%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e6%96%b9%e6%b3%95%e3%81%ae%e8%a8%ad%e5%ae%9a%e6%96%b9%e6%b3%95\/"},"modified":"2024-04-05T14:40:06","modified_gmt":"2024-04-05T05:40:06","slug":"mfc%e3%81%aecolevariant%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e6%96%b9%e6%b3%95%e3%81%ae%e8%a8%ad%e5%ae%9a%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mfc%e3%81%aecolevariant%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e6%96%b9%e6%b3%95%e3%81%ae%e8%a8%ad%e5%ae%9a%e6%96%b9%e6%b3%95\/","title":{"rendered":"MFC\u306eCOleVariant\u30af\u30e9\u30b9\u306e\u65b9\u6cd5\u306e\u8a2d\u5b9a\u65b9\u6cd5"},"content":{"rendered":"<p>MFC \u306e COleVariant \u30af\u30e9\u30b9\u3092\u5272\u308a\u5f53\u3066\u308b\u65b9\u6cd5\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u30021. \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u3092\u4f7f\u7528\u3057\u3066 COleVariant \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0COleVariant\u00a0var;<\/pre>\n<p>COleVariant\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u521d\u671f\u5316\u3059\u308b\u305f\u3081\u306b\u5358\u7d14\u306a\u30bf\u30a4\u30d7\u306e\u5024\u3092\u4f7f\u7528\u3059\u308b<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0int\u00a0intValue\u00a0=\u00a010;<\/pre>\n<p>COleVariant\u00a0var(intValue);<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>\u6587\u5b57\u5217\u3092\u4f7f\u7528\u3057\u3066 COleVariant \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u521d\u671f\u5316\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0CString\u00a0strValue\u00a0=\u00a0\u201cHello\u201d;<\/pre>\n<p>&nbsp;<\/p>\n<p>COleVariant\u00a0var(strValue);<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>\u65e5\u4ed8\u3068\u6642\u523b\u306e\u5024\u3092\u4f7f\u3063\u3066COleVariant\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u521d\u671f\u5316\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0COleDateTime\u00a0dateTimeValue(2022,\u00a01,\u00a01,\u00a00,\u00a00,\u00a00);<\/pre>\n<p>&nbsp;<\/p>\n<p>COleVariant\u00a0var(dateTimeValue);<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>SafeArray\u3092\u4f7f\u7528\u3059\u308b\u521d\u671f\u5316COleVariant\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0SAFEARRAY*\u00a0psa\u00a0=\u00a0SafeArrayCreateVector(VT_I4,\u00a00,\u00a010);<\/pre>\n<p>&nbsp;<\/p>\n<p>COleVariant\u00a0var(psa,\u00a0VT_ARRAY\u00a0|\u00a0VT_I4);<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>\u4ed6\u306e COleVariant \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089 COleVariant \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u521d\u671f\u5316\u3059\u308b<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0COleVariant\u00a0var1(10);<\/pre>\n<p>&nbsp;<\/p>\n<p>COleVariant\u00a0var2(var1);<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>COleVariant \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7a7a\u306e\u5024\u306b\u521d\u671f\u5316\u3059\u308b\u306b\u306f\u3001 VT_NULL \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0COleVariant\u00a0varNull;<\/pre>\n<p>&nbsp;<\/p>\n<p>varNull.vt\u00a0=\u00a0VT_NULL;<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>COleVariant \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7a7a\u306e\u5024\u3067\u521d\u671f\u5316\u3059\u308b\u306b\u306f\u3001 VT_EMPTY \u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\">\u00a0\u00a0COleVariant\u00a0varEmpty;<\/pre>\n<p>&nbsp;<\/p>\n<p>varEmpty.vt\u00a0=\u00a0VT_EMPTY;<\/p>\n<pre class=\"post-pre\"><\/pre>\n<p>\u6ce8\u610f\uff1aCOleVariant\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30c7\u30fc\u30bf\u578b\uff08vt\uff09\u3068\u30c7\u30fc\u30bf\u5024\uff08\u30d0\u30ea\u30a2\u30f3\u30c8\uff09\u3092\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8a73\u3057\u304f\u306fMFC\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MFC \u306e COleVariant \u30af\u30e9\u30b9\u3092\u5272\u308a\u5f53\u3066\u308b\u65b9\u6cd5\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u30021. \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u3092\u4f7f\u7528\u3057\u3066 COleVariant \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002 \u00a0\u00a0COleVariant\u00a0var; 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