如何给一数据窗口动态的添加一个计算字段？比如有数据列A,B。怎么在程序里写一个A+B?

[yzulx]

thank you

[Jonea]

<DW Control Name>.Modify(&
"create compute(band=<Detail, Footer, Header, Header.<group #>, Summary, Trailer.<group #>, Background, Foreground>" + &
" color='<a long>' alignment='<0 - Left, 1 - Right, 2 - Center>' border='<0 - None, 1- Shadow, 2 - Box, 3 - Resize, 4 - Underline, 5 - 3D Lowered, 6 - 3D Raised>'" + &
" height.autosize=<Yes or No> pointer='<Arrow!, Cross!, HourGlass!, IBeam!, Icon!, Size!, SizeNESW!, SizeNS!, SizeNWSE!, SizeWE!, UpArrow!, or cursor filename (with path)>' moveable=<0 - False, 1 - True> resizeable=<0 - False, 1 - True> x='<an integer>' y='<an integer>' height='<an integer>' width='<an integer>' format='<constant string containing display format (i.e., [general]) for col (can also be an expression)>'" + &
" name=<string> tag='<string>' expression='<expression>' font.face='<name of type face (i.e., SYSTEM, COURIER)>' font.height='<negative number for points, positive number for PBUs (i.e., -10 = 10 points, 10 = 10 PBUs>' font.weight='<400 - Normal, 700 - Bold>' font.family='<0 - AnyFont, 1 - Roman, 2 - Swiss, 3 - Modern, 4 - Script, 5 - Decorative>' font.pitch='<0 - default, 1 - Fixed, 2 - Variable>' font.charset='<0 - Ansi, 1 - default, 2 - Symbol, 128 - Shift jis, 255 - OEM>' font.italic='<0 - False, 1 - True>' font.strikethrough='<0 - False, 1 - True>' font.underline='<0 - False, 1 - True>' background.mode='<0 - Opaque, 1 - Transparent>' background.color='<a long>')")

[yzulx]

这个我试过了，可是在数据窗口中没有显示我要的结果：（

[Ascn]

请问数据窗口对象也是动态创建的吗？
如果是，动态生成一个计算列不难吧？
如果不是，那就不用用程序来动态生成了。