Modify screen in module programming

In this example we will write a module program with dynamic screen:
Business requirement:
The screen as below :

After user press the change button,the text field Depart.city,Arrival city,Flight time,Departure,Arrival Time will editable as below:

Here the code of the module pool program:

Notice that,to set read only these text fields,first make them in the group MOD

After pressing change button the code as below will execute:

Module pool programming: Create GUI Status example

Create the Guide status for program.

Enter the status name STATUS_1000

 Add item CAL to menu bar.Enter the name of menu

 Double click to CAL item.The screen will show as below:

 Create the action for the item on the Standard tool bar.In this example ,We create the action for the button BACK on the standard toolbar:

 Use the code as below to call the status bar STATUS_1000 which created on the first  step:

 Create the item CAL for the application toolbar :

 Run the progarm:You coud use function Calculate via menu item Calculate on Menu bar or button Calculate standard tool bar.The screen will show as below:

The end!

Module programming(user dialog programming)

1.What is module programming(dialog programming) ?
2.Module pool programming step by step

Module pool programming in abap step by step

1. Episode 01 : Example module pool program simple for input,output and how to use event Process before output and Process after input.
2. Episode 02: Example create GUI status in module pool programming
3. Episode 03: Modify screen in module pool programming
4. Episode 04: Create title of module program