CreateEllipticRgn
內(nèi)容
CreateEllipticRgn |
VB聲明 |
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Declare Function CreateEllipticRgn Lib "gdi32" Alias "CreateEllipticRgn" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long |
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說明 |
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創(chuàng)建一個橢圓，該橢圓與X1，Y1和X2，Y2坐標點確定的矩形內(nèi)切 |
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返回值 |
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Long，執(zhí)行成功則為區(qū)域句柄，失敗則為零 |
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參數(shù)表 |
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參數(shù) |
類型及說明 |
X1,Y1 |
Long，矩形左上角X，Y坐標 |
X2,Y2 |
Long，矩形右下角X，Y坐標 |
注解 |
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不用時一定要用DeleteObject函數(shù)刪除區(qū)域。用Ellipse API函數(shù)繪出的橢圓與該橢圓區(qū)域不完全相同，因為本函數(shù)的繪圖計算不包括矩形的下邊和右邊 |
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