SAP可以定义子屏幕，将所定义屏幕窗体作为一个新的对话框窗体来引用，子屏幕分为两种，一种为INCLUDE SCREEN，可以通过report端程序直接调用，另一种是subscreen，需要通过screen painter所创建引用，今天先写INCLUDE SCREEN
1.在子屏幕引用中可以通过参数来指定子屏幕的具体大小及位置，INCLUDE screen相关语法定义如下：
SELECTION-SCREEN BEGIN OF SCREEN scr.
SELECTION-SCREEN END OF SCREEN scr.
示例：
SELECTION-SCREEN BEGIN OF SCREEN 123 AS WINDOW TITLE text-a01. "定义子屏幕123 PARAMETERS:matnr LIKE mara-matnr. PARAMETERS: type AS CHECKBOX. SELECTION-SCREEN END OF SCREEN 123. CALL SCREEN 123 STARTING AT 10 10 "指定子屏幕的大小和位置 ENDING AT 80 10.
效果如下图：
2.当一个主屏幕调用另外一个子屏幕时候必须使用 call selection-screen 的方法
REPORT ztest_sum. TABLES:mara. PARAMETERS: type AS CHECKBOX. call selection-screen 123. SELECTION-SCREEN BEGIN OF SCREEN 123 AS WINDOW TITLE text-a01. "定义子屏幕123 PARAMETERS:matnr LIKE mara-matnr. SELECTION-SCREEN END OF SCREEN 123.
效果如下点击运行
出现子屏幕如下：
