📄 setpixel.htm
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<td width="100%" height="16">SetPixel</td>
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<td width="102%" colspan="2">VB声明</td>
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<td width="102%" colspan="2">Declare Function SetPixel Lib "gdi32" Alias
"SetPixel" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal crColor
As Long) As Long</td>
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<td width="102%" colspan="2">说明</td>
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<td width="102%" colspan="2">在指定的设备场景中设置一个像素的RGB值</td>
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<td width="102%" colspan="2">返回值</td>
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<td width="102%" colspan="2">Long，指定点的实际RGB颜色。如设备不支持指定的准确颜色，则返回的值会与crColor有所不同。如指定的点不能设置，则会返回-1（例如，指定的点可能位于设备场景剪切区外面）。会设置<a
href="GetLastError.htm">GetLastError</a></td>
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<td width="102%" colspan="2">参数表</td>
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<td width="25%">参数</td>
<td width="77%">类型及说明</td>
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<td width="25%">hdc</td>
<td width="77%">Long，设备场景的句柄</td>
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<td width="25%">x,y</td>
<td width="77%">Long，要设置的点，用逻辑坐标表示</td>
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<td width="25%">crColor</td>
<td width="77%">Long，指定像素的新RGB颜色</td>
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<td width="102%" colspan="2">注解</td>
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<td width="102%" colspan="2"><p align="left">可用<a href="GetDeviceCaps.htm">GetDeviceCaps</a>判断一个设备是否支持这个函数</td>
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