📄 querydosdevice.htm
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<title>QueryDosDevice</title>
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<td width="100%" height="16"><a name="QueryDosDevice">QueryDosDevice</a></td>
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<td width="100%" colspan="2">VB声明</td>
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<td width="100%" colspan="2">Declare Function QueryDosDevice Lib "kernel32"
Alias "QueryDosDeviceA" (ByVal lpDeviceName As String, ByVal lpTargetPath As
String, ByVal ucchMax As Long) As Long</td>
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<td width="100%" colspan="2">说明</td>
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<td width="100%" colspan="2">在Windows NT中，DOS设备名会映射成NT系统设备名。该函数可判断当前的设备映射情况</td>
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<td width="100%" colspan="2">返回值</td>
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<td width="100%" colspan="2">Long，零表示出错。如执行成功，返回保存到lpTargetPath的字符数。会设置<a
href="GetLastError.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/GetLastError.htm">GetLastError</a></td>
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<td width="100%" colspan="2">参数表</td>
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<td width="25%">参数</td>
<td width="75%">类型及说明</td>
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<td width="25%">lpDeviceName</td>
<td width="75%">String，如果是vbNullString，那么lpTargetPath会载入当前映射的MS-DOS名称的一个列表。如果是个MS-DOS名，则lpTargetPath会载入一个设备映射列表（第一个名字是活动映射，后续的名字是以前尚未删掉的映射）</td>
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<td width="25%">lpTargetPath</td>
<td width="75%">String，名称列表，具体取决于lpDeviceName参数。这些名字用NULL字符分隔。列表最后用两个连续的NULL字符中止</td>
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<td width="25%">ucchMax</td>
<td width="75%">Long，lpTargetPath缓冲区的大小</td>
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<td width="100%" colspan="2">注解</td>
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<td width="100%" colspan="2"><p align="left">可用DefineDosDevice函数将映射变成DOS设备名</td>
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<td width="100%" colspan="2">适用平台</td>
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<td width="100%" colspan="2">Windows NT</td>
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<td width="100%"><p align="right"><a href="#QueryDosDevice">Top</a></td>
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