?? setboundsrect.htm
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<td width="100%" height="16"><a name="SetBoundsRect">SetBoundsRect</a></td>
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<td width="102%" colspan="3">VB聲明</td>
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<td width="102%" colspan="3">Declare Function SetBoundsRect Lib "gdi32" Alias
"SetBoundsRect" (ByVal hdc As Long, lprcBounds As RECT, ByVal flags As Long) As
Long</td>
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<td width="102%" colspan="3">說明</td>
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<td width="102%" colspan="3">設置指定設備場景的邊界矩形。每個設備場景都有一個邊界矩形，編程者可用來堆放表示當前圖象邊界的信息。當允許邊界矩形堆放時，每次windows向設備場景繪圖，繪圖位置都與邊界矩形比較，若有必要就要擴展邊界矩形以包括繪圖位置。這提供了一種方法可確定設備場景的哪些部分已畫了</td>
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<td width="102%" colspan="3">返回值</td>
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<td width="102%" colspan="3">Long，調用本函數前的邊界設置：<br>
DCB_SET：邊界矩形不為空<br>
DCB_RESET：邊界矩形為空<br>
DCB_ENABLE：邊界矩形已被堆放<br>
DCB_DISABLE：邊界矩形沒被堆放</td>
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<td width="102%" colspan="3">參數表</td>
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<td width="25%">參數</td>
<td width="77%" colspan="2">類型及說明</td>
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<td width="25%">hdc</td>
<td width="77%" colspan="2">Long，邊界矩形對應的設備場景</td>
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<td width="25%">lprcBounds</td>
<td width="77%" colspan="2"><a href="RECT.htm">RECT</a>，用于設置邊界矩形的矩形</td>
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<td width="25%" rowspan="5">flags</td>
<td width="77%" colspan="2">Long，標志集合，可用下列常數組合而成</td>
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<td width="37%">DCB_ACCUMULATE</td>
<td width="38%">新的邊界矩形由當前邊界矩形和lprcBounds聯合而成</td>
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<td width="37%">DCB_DISABLE</td>
<td width="38%">關閉邊界堆放，該值為默認值</td>
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<td width="37%">DCB_ENABLE</td>
<td width="38%">打開邊界堆放</td>
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<td width="37%">DCB_RESET</td>
<td width="38%">清除原有邊界矩形，用DCB_ACCUMULATE設置新的邊界矩形為lprcBounds</td>
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<td width="100%"><p align="right"><a href="#SetBoundsRect">Top</a></td>
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