Tcode:VOFM / VOFN
Func areas:http://hi.youkuaiyun.com/attachment/201108/5/96989_1312513989z223.png
Customerzation:
The standard SAP system contains some standard routines for checking. You can also define your own routines according to the needs of your company.
customerzation formulas must begin with 9.
eg.
http://hi.youkuaiyun.com/attachment/201108/5/96989_1312514919755H.png
after the coding work,the module consulstant must sets the IMG,or,it will not execute.