?? 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(tǒng)消息廣播給系統(tǒng)中所有的頂級(jí)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(cuò)。如設(shè)置了BSF_QUERY，而且至少有一個(gè)消息接收者返回零，那么這個(gè)函數(shù)返回零</td>
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<td width="103%" colspan="3">參數(shù)表</td>
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<td width="25%">參數(shù)</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(shù)的一個(gè)或多個(gè)</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(duì)磁盤進(jìn)行刷新（將未存盤的數(shù)據(jù)存下來</td>
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<td width="38%">BSF_FORCEIFHUNG</td>
<td width="38%">如目標(biāo)處于掛起狀態(tài)，則在設(shè)定的超時(shí)后到期返回</td>
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<td width="38%">BSF_IGNORECURRENTTASK</td>
<td width="38%">發(fā)送任務(wù)不接收消息</td>
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<td width="38%">BSF_LPARAMBUFFER</td>
<td width="38%">lParam指向一個(gè)內(nèi)存緩沖區(qū)</td>
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<td width="38%">BSF_NOHANG</td>
<td width="38%">跳過被掛起的所有進(jìn)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(fā)給進(jìn)程，只有前一個(gè)返回TRUE時(shí)，才進(jìn)入下一個(gè)進(jìn)程</td>
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<td width="25%" rowspan="6">pdw</td>
<td width="78%" colspan="2">Long，下述常數(shù)的一個(gè)或多個(gè)</td>
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<td width="38%">BSF_ALLCOMPONENTS</td>
<td width="38%">消息進(jìn)入能夠接收消息的每一個(gè)系統(tǒng)組件</td>
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<td width="38%">BSF_APPLICATIONS</td>
<td width="38%">消息到達(dá)應(yīng)用程序</td>
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<td width="38%">BSF_INSTALLABLEDRIVERS</td>
<td width="38%">消息到達(dá)可安裝的驅(qū)動(dòng)程序</td>
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<td width="38%">BSF_NETDRIVERS</td>
<td width="38%">消息到達(dá)網(wǎng)絡(luò)驅(qū)動(dòng)程序</td>
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<td width="38%">BSF_VXDS</td>
<td width="38%">消息到達(dá)系統(tǒng)設(shè)備驅(qū)動(dòng)程序</td>
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<td width="25%">un</td>
<td width="78%" colspan="2">Long，消息編號(hào)</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(diào)用進(jìn)程地址空間的一個(gè)內(nèi)存緩沖區(qū)的地址，而且緩沖區(qū)的第一個(gè)16位字包含了緩沖區(qū)的長度</td>
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<td width="100%"><p align="right"><a href="#BroadcastSystemMessage">Top</a></td>
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