📄 getenvironmentvariable.htm
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<td width="100%" height="16">GetEnvironmentVariable</td>
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<td width="102%" colspan="2">VB声明</td>
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<td width="102%" colspan="2">Declare Function GetEnvironmentVariable Lib
"kernel32" Alias "GetEnvironmentVariableA" (ByVal lpName As String,
ByVal lpBuffer As String, ByVal nSize As Long) As Long</td>
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<td width="102%" colspan="2">说明</td>
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<td width="102%" colspan="2">取得一个环境变量的值</td>
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<td width="102%" colspan="2">返回值</td>
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<td width="102%" colspan="2">Long，载入的环境变量的长度。如指定的环境字串不存在，就返回零。如lpBuffer的长度不足以全部容下字串，则返回字串的全长。随后可用这个长度分配一个足够大的缓冲区</td>
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<td width="102%" colspan="2">参数表</td>
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<td width="25%">参数</td>
<td width="77%">类型及说明</td>
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<td width="25%">lpName</td>
<td width="77%">String，欲读入的环境字串的名称</td>
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<td width="25%">lpBuffer</td>
<td width="77%">String，随同字串装载的一个缓冲区。注意预先将其初始化到合适的长度</td>
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<td width="25%">nSize</td>
<td width="77%">Long，lpBuffer的长度</td>
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<td width="100%"><p align="right">Top</td>
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