In the custom development, we have come across the problem where the standard buttons are not getting enabled or disabled. For e.g. we are calling the additional screen from the standard screen but when we make any changes to that additional screen as per the Sage X3 standard the main screen Cancel or Delete button is not getting enabled. After some finding, we have got the way to enable/disable standard button through code.
By using simple standard Enable/Disable command, we can change the state of standard buttons. There are two alternatives to using this command. Either we can use the button code or button number. Kindly refer to the below snippet of code of both alternatives:
Alternative 1
Here,
GSTAANU is the code for a Delete button.
GSTAFIN is the code for Cancel button.

Fig 1.1: To Disable the Button through Variables
Alternative 2
Here,
92 is the code for a Delete button.
1792 is the code for Cancel button.

Fig 1.2: To Disable the button through Statuses(Code)
Hope this helps.
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