如何获取显示器的HDC

Question

想用GetPixel做个屏幕拾色器，定义如下：

Declare Function GetPixel Lib "gdi32" Alias "GetPixel" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long) As Long

问题是我不懂获取显示器的HDC，即设备环境句柄

还有，返回的是Long，是怎么表示RGB的？

求教

Answer 1

Hi X.TK,

我想你可以从这个函数上得到些启发：createDC：http://baike.baidu.com/view/1080521.html?fromTaglist，这是这个函数的具体例子：http://zhidao.baidu.com/question/55709926.html。

关于如何用long型表示RGB，你看下这个网站，肯定一目了然：http://www.9223.com/other/rgb.htm

Best regards,

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Mike Feng [MSFT]
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Answer 2

还是斑竹牛！太感谢了！原来就是#RGB