Shanghai WTL Welding Equipment Manufacturing Co. , Ltd.

上海威特力焊接设备制造股份有限公司。

A graphic program writed by WTL . you can change the line width and line style.

WTL编写的一个绘图程序, 可设置线宽,线型,改变字体和颜色.

Owner drawn controls and sub classing in WTL if you want to understand the source.

所有者绘制控制和在WTL分级分，如果你想了解源。