?? invalidaterect.htm
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<title>InvalidateRect</title>
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<td width="100%" height="16"><a name="InvalidateRect,InvalidateRectBynum">InvalidateRect,InvalidateRectBynum</a></td>
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<td width="100%" colspan="2">VB聲明</td>
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<td width="100%" colspan="2">Declare Function InvalidateRect& Lib "user32"
(ByVal hwnd As Long, lpRect As RECT, ByVal bErase As Long)<br>
Declare Function InvalidateRectBynum& Lib "user32" Alias
"InvalidateRect" (ByVal hwnd As Long, ByVal lpRect As Long, ByVal bErase As
Long)</td>
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<td width="100%" colspan="2">說明</td>
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<td width="100%" colspan="2">這個函數(shù)屏蔽一個窗口客戶區(qū)的全部或部分區(qū)域。這會導致窗口在事件期間部分重畫</td>
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<td width="100%" colspan="2">返回值</td>
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<td width="100%" colspan="2">Long，非零表示成功，零表示失敗</td>
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<td width="100%" colspan="2">參數(shù)表</td>
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<td width="25%">參數(shù)</td>
<td width="75%">類型及說明</td>
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<td width="25%">hwnd</td>
<td width="75%">Long，待屏蔽窗口的句柄</td>
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<td width="25%">lpRect</td>
<td width="75%"><a href="RECT.htm">RECT</a>，用于描述待屏蔽矩形部分的一個矩形結構。可用InvalidateRectBynum函數(shù)，同時將lpRect設為零（Long數(shù)據(jù)類型），從而屏蔽（或禁用）整個窗口</td>
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<td width="25%">bErase</td>
<td width="75%">Long，TRUE（非零）導致指定的區(qū)域在重畫前先刪除</td>
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<td width="100%" colspan="2">注解</td>
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<td width="100%" colspan="2"><p align="left">一旦系統(tǒng)有些更新屏幕的閑置時間可用，windows就會重畫窗口</td>
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<td width="100%"><p align="right"><a href="#InvalidateRect,InvalidateRectBynum">Top</a></td>
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