📄 getwindowlong.htm
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<title>GetWindowLong</title>
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<td width="100%" height="16"><a name="GetWindowLong">GetWindowLong</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 GetWindowLong Lib "user32" Alias
"GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex 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">从指定窗口的结构中取得信息</td>
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<td width="102%" colspan="3">返回值</td>
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<td width="102%" colspan="3">Long，由nIndex决定。零表示出错。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="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%">hwnd</td>
<td width="77%" colspan="2">Long，欲为其获取信息的窗口的句柄</td>
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<td width="25%" rowspan="11">nIndex</td>
<td width="77%" colspan="2">Long，欲取回的信息，可以是下述任何一个常数：</td>
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<td width="37%">GWL_EXSTYLE</td>
<td width="38%">扩展窗口样式</td>
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<td width="37%">GWL_STYLE</td>
<td width="38%">窗口样式</td>
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<td width="37%">GWL_WNDPROC</td>
<td width="38%">该窗口的窗口函数的地址</td>
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<td width="37%">GWL_HINSTANCE</td>
<td width="38%">拥有窗口的实例的句柄</td>
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<td width="37%">GWL_HWNDPARENT</td>
<td width="38%">该窗口之父的句柄。不要用<a href="SetWindowWord.htm" tppabs="http://personal.hb.cninfo.net/~vbapi/SetWindowWord.htm">SetWindowWord</a>来改变这个值</td>
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<td width="37%">GWL_ID</td>
<td width="38%">对话框中一个子窗口的标识符</td>
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<td width="37%">GWL_USERDATA</td>
<td width="38%">含义由应用程序规定</td>
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<td width="37%">DWL_DLGPROC</td>
<td width="38%">这个窗口的对话框函数地址</td>
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<td width="37%">DWL_MSGRESULT</td>
<td width="38%">在对话框函数中处理的一条消息返回的值</td>
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<td width="37%">DWL_USER</td>
<td width="38%">含义由应用程序规定</td>
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<td width="100%"><p align="right"><a href="#GetWindowLong">Top</a></td>
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