?? broadcastsystemmessage.htm
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<title>BroadcastSystemMessage</title>
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<td width="100%" height="16"><a name="BroadcastSystemMessage">BroadcastSystemMessage</a></td>
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<td width="103%" colspan="3">VB聲明</td>
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<td width="103%" colspan="3">Declare Function BroadcastSystemMessage Lib
"user32" Alias "BroadcastSystemMessage" (ByVal dw As Long, pdw As
Long, ByVal un As Long, ByVal wParam As Long, ByVal lParam As Long) As Long</td>
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<td width="103%" colspan="3">說明</td>
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<td width="103%" colspan="3">將一條系統消息廣播給系統中所有的頂級窗口</td>
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<td width="103%" colspan="3">返回值</td>
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<td width="103%" colspan="3">Long，大于零表示成功；-1表示出錯。如設置了BSF_QUERY，而且至少有一個消息接收者返回零，那么這個函數返回零</td>
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<td width="103%" colspan="3">參數表</td>
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<td width="25%">參數</td>
<td width="78%" colspan="2">類型及說明</td>
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<td width="25%" rowspan="8">dw</td>
<td width="78%" colspan="2">Long，下述常數的一個或多個</td>
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<td width="38%">BSF_FLUSHDISK</td>
<td width="38%">每次處理完一條消息后，都對磁盤進行刷新（將未存盤的數據存下來</td>
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<td width="38%">BSF_FORCEIFHUNG</td>
<td width="38%">如目標處于掛起狀態，則在設定的超時后到期返回</td>
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<td width="38%">BSF_IGNORECURRENTTASK</td>
<td width="38%">發送任務不接收消息</td>
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<td width="38%">BSF_LPARAMBUFFER</td>
<td width="38%">lParam指向一個內存緩沖區</td>
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<td width="38%">BSF_NOHANG</td>
<td width="38%">跳過被掛起的所有進程</td>
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<td width="38%">BSF_POSTMESSAGE</td>
<td width="38%">投遞消息。不與BSF_LPARAMBUFFER和BSF_QUERY兼容</td>
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<td width="38%">BSF_QUERY</td>
<td width="38%">將消息順序發給進程，只有前一個返回TRUE時，才進入下一個進程</td>
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<td width="25%" rowspan="6">pdw</td>
<td width="78%" colspan="2">Long，下述常數的一個或多個</td>
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<td width="38%">BSF_ALLCOMPONENTS</td>
<td width="38%">消息進入能夠接收消息的每一個系統組件</td>
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<td width="38%">BSF_APPLICATIONS</td>
<td width="38%">消息到達應用程序</td>
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<td width="38%">BSF_INSTALLABLEDRIVERS</td>
<td width="38%">消息到達可安裝的驅動程序</td>
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<td width="38%">BSF_NETDRIVERS</td>
<td width="38%">消息到達網絡驅動程序</td>
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<td width="38%">BSF_VXDS</td>
<td width="38%">消息到達系統設備驅動程序</td>
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<td width="25%">un</td>
<td width="78%" colspan="2">Long，消息編號</td>
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<td width="25%">wParam</td>
<td width="78%" colspan="2">Long，由消息決定</td>
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<td width="25%">lParam</td>
<td width="78%" colspan="2">Long，由消息決定。如指定了BSF_LPARAMBUFFER，這就是位于調用進程地址空間的一個內存緩沖區的地址，而且緩沖區的第一個16位字包含了緩沖區的長度</td>
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<td width="100%"><p align="right"><a href="#BroadcastSystemMessage">Top</a></td>
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