控制物料描述增强

1.回车时触发，使用隐式增强，位置在函数MAKT_MAKTX结束时 if sy-tcode = 'MM01' or sy-tcode = 'MM02'. data: ls_makt like makt, lv_msg(255). SELECT SINGLE * INTO ls_makt FROM makt WHERE maktx = wmakt-maktx and matnr ne wmakt-m

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