我的颜色拾取器。 HDC hdc = ::GetDC(NULL) 特别重要，取得是SCREEN的DC-My color picker. HDC hdc =:: GetDC (NULL) particularly important to obtain a DC-SCREEN

颜色拾取器的控件。可以直接用。有源码。也可参考-Color picker controls. It can be used directly. There is source code. Also refer to