如图，我想让那些蓝色融为一体，请问tab左边的白色边框怎么去掉？
------解决思路----------------------
//创建
FUNCTION ulong CreateRoundRectRgn(ulong X1,ulong Y1,ulong X2,ulong Y2,ulong X3,ulong Y3) LIBRARY "gdi32.dll"ALIAS FOR "CreateRoundRectRgn;ansi"
FUNCTION ulong SetWindowRgn(ulong hWnd,ulong hRgn,boolean bRedraw) LIBRARY "user32.dll"ALIAS FOR "SetWindowRgn;ansi"
试试这两个API