VB6.0源码下载：VB创建组合的圆形窗口，单击窗口则调用SetWindow子过程设置窗口形状，双击窗口则调用Reset子过程恢复窗口形状。圆形组合窗体的实现过程中将两个图形区域相加（叠加），也可将两个区域相减，或进行进行“或”操作，“异或”操作等。

　　Module1.bas中的SetWindow子过程实现设置窗口形状，创建最外面的大圆区域，创建中间的圆区域，创建最里层的小圆区域，用大圆减去中间的圆得到的区域保存在hSrcRgn1，用得到的区域加上小圆并保存在hSrcRgn1；

　　Reset子过程作用是恢复窗口形状为矩形-VB6.0 source code download: VB to create a combination of circular window, click the window is called SetWindow sub-process settings window shape, double-click the window procedure is called Reset to restore the child window shapes. Realized in the form of a circular process portfolio by adding two graphics area (overlay), the two regions can also be subtracted, or conduct "or" operation "exclusive or" operation.

SetWindow Module1.bas the settings window sub-process to achieve the shape to create the outermost region of the great circle, creating a circular region in the middle of creating the innermost region of the small circle, using the great circle minus the area of ​ ​ the intermediate obtained is stored in a circular hSrcRgn1, with small round area get together and stored in hSrcRgn1　

Reset the role of sub-process is to restore the shape of a rectangular window