📄 wnetopenenum.htm
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<title>WNetOpenEnum</title>
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<td width="100%" height="16"><a name="WNetOpenEnum">WNetOpenEnum</a></td>
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<td width="102%" colspan="3">VB声明</td>
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<td width="102%" colspan="3">Declare Function WNetOpenEnum Lib "mpr.dll" Alias
"WNetOpenEnumA" (ByVal dwScope As Long, ByVal dwType As Long, ByVal dwUsage As
Long, lpNetResource As NETRESOURCE, lphEnum As Long) As Long</td>
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<td width="102%" colspan="3">说明</td>
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<td width="102%" colspan="3">启动对网络资源进行枚举的过程。这个函数会返回由<a
href="WNetEnumResource.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/WNetEnumResource.htm">WNetEnumResource</a>函数用于枚举资源所用的一个句柄</td>
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<td width="102%" colspan="3">返回值</td>
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<td width="102%" colspan="3">Long，零表示成功。会设置<a href="GetLastError.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/GetLastError.htm">GetLastError</a>。如<a
href="GetLastError.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/GetLastError.htm">GetLastError</a>是ERROR_EXTENDED_ERROR，则可用<a
href="WNetGetLastError.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/WNetGetLastError.htm">WNetGetLastError</a>取得额外的错误信息</td>
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<td width="102%" colspan="3">参数表</td>
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<td width="25%">参数</td>
<td width="77%" colspan="2">类型及说明</td>
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<td width="25%" rowspan="4">dwScope</td>
<td width="77%" colspan="2">Long，指定要枚举的资源范围。可设为下述常数之一：</td>
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<td width="37%">RESOURCE_CONNECTED</td>
<td width="38%">枚举已连接的资源（忽略dwUsage）</td>
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<td width="37%">RESOURCE_GLOBALNET</td>
<td width="38%">枚举所有资源</td>
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<td width="37%">RESOURCE_REMEMBERED</td>
<td width="38%">只枚举永久性连接</td>
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<td width="25%" rowspan="4">dwType</td>
<td width="77%" colspan="2">Long，下述常数之一</td>
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<td width="37%">RESOURCE_ANY</td>
<td width="38%">枚举所有类型的网络资源</td>
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<td width="37%">RESOURCE_DISK</td>
<td width="38%">枚举磁盘资源</td>
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<td width="37%">RESOURCE_PRINT</td>
<td width="38%">枚举打印资源</td>
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<td width="25%" rowspan="3">dwUsage</td>
<td width="77%" colspan="2">Long，可设为零，表示枚举所有资源；或设为下述常数的一个或两个：</td>
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<td width="37%">RESOURCEUSAGE_CONNECTABLE</td>
<td width="38%">只枚举那些能够连接的资源</td>
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<td width="37%">RESOURCEUSAGE_CONTAINER</td>
<td width="38%">只枚举包含了其他资源的资源</td>
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<td width="25%">lpNetResource</td>
<td width="77%" colspan="2"><a href="NETRESOURCE.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/NETRESOURCE.htm">NETRESOURCE</a>，这个结构指定了一个容器资源。该函数会枚举包含于这里指定的某个指定资源内的资源。如设为NULL（把声明变成ByVal
As Long），那么函数会枚举顶级网络资源。倘若在dwScope参数里没有指定RESOURCE_GLOBALNET，那么必须为NULL</td>
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<td width="25%">lphEnum</td>
<td width="77%" colspan="2">Long，指定一个变量，用于装载一个枚举句柄。该句柄由<a
href="WNetEnumResource.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/WNetEnumResource.htm">WNetEnumResource</a>函数使用。必须用<a
href="WNetCloseEnum.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/WNetCloseEnum.htm">WNetCloseEnum</a>函数将其清除</td>
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