📄 sendmessagetimeout.htm
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<title>SendMessageTimeout</title>
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<td width="100%" height="16"><a name="SendMessageTimeout">SendMessageTimeout</a></td>
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<td width="101%" colspan="3">VB声明</td>
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<td width="101%" colspan="3">Declare Function SendMessageTimeout Lib "user32"
Alias "SendMessageTimeoutA" (ByVal hwnd As Long, ByVal msg As Long, ByVal wParam
As Long, ByVal lParam As Long, ByVal fuFlags As Long, ByVal uTimeout As Long, lpdwResult
As Long) As Long</td>
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<td width="101%" colspan="3">说明</td>
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<td width="101%" colspan="3">向窗口发送一条消息。如窗口位于不同的线程中，则利用这个函数可以指定一个超时值，以便在另一个进程挂起的时候防止调用进程也永远挂起</td>
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<td width="101%" colspan="3">返回值</td>
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<td width="101%" colspan="3">Long，成功时返回TRUE，失败时返回FALSE。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="101%" colspan="3">参数表</td>
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<td width="25%">参数</td>
<td width="76%" colspan="2">类型及说明</td>
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<td width="25%">hwnd</td>
<td width="76%" colspan="2">Long，要接收消息的一个窗口的句柄</td>
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<td width="25%">msg</td>
<td width="76%" colspan="2">Long，消息的标识符</td>
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<td width="25%">wParam</td>
<td width="76%" colspan="2">Long，由消息决定</td>
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<td width="25%">lParam</td>
<td width="76%" colspan="2">Long，由消息决定</td>
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<td width="25%" rowspan="4">fuFlags</td>
<td width="76%" colspan="2">Long，下述常数的一个或多个</td>
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<td width="37%">SMTO_ABORTIFHUNG</td>
<td width="38%">如目标进程挂起，则函数立即返回</td>
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<td width="37%">SMTO_BLOCK</td>
<td width="38%">除非函数返回，否则调用线程不能处理消息</td>
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<td width="37%">SMTO_NORMAL</td>
<td width="38%">允许调用线程处理消息，同时保持函数继续执行</td>
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<td width="25%">uTimeout</td>
<td width="76%" colspan="2">Long，超时值，采用毫秒为单位</td>
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<td width="25%">lpdwResult</td>
<td width="76%" colspan="2">Long，用于装载函数结果的一个变量</td>
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<td width="100%"><p align="right"><a href="#SendMessageTimeout">Top</a></td>
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