Step 1: Change some form properties

1. Select the Administration Field Group on the TabGeneral TabPage and set the AutoDataGroup Property to No.
2. Select the Administration_OneTimeCustomer CheckBox field in the Field Group Administration and set the AutoDeclaration property to Yes.

Step 2: Create a form method to enable/disable the form element

Create a new form method setAccessOneTimeCustomer:

void setAccesssOneTimeCustomer()     
{ 

    if (CustTable.MandatoryCreditLimit)     
    { 

        Administration_OneTimeCustomer.enabled(false);     
    } 

    else     
    { 

        Administration_OneTimeCustomer.enabled(true);     
    } 

    custTable_DS.refresh();    
}

Step 3: call the form method in the active and the modified

Call the newly created form method in the active method on the Data Source of the Form. As such, the second field will be enabled or disabled appropriately upon scrolling through the form.

public int active() 

{   
    int ret; 
    element.setAccesssOneTimeCustomer(); 
    ret = super(); 
    return ret; 

}

Call the newly created form method in the modified method on the field which should trigger the enabling or disabling. In our example, it is the field MandatoryCreditLimit. As such the second field, in our case OneTimeCustomer wil be enabled or disabled each time the value of MandatoryCreditLimit is changed.

public void modified()   
{ 

    element.setAccesssOneTimeCustomer();     
    super(); 

}

Step 4: Test your modifications

Open the CustTable form: check the field Mandatory credit limit: the field One-time customer will be disabled immediately.