To add dynamics default controls on UI in D365FO

 Reference Class:

SysSystemDefinedButtons

Sample code:

[ExtensionOf(classStr(SysSystemDefinedButtons))]

internal final class SysSystemDefinedButtonsCls_SAN_Extension

{

    private static str SANDE_SystemDefinedButtonsActionPane = "SystemDefinedButtonsActionPane";

    private static str SAN_SystemDefinedButtonsActionPane = "SAN_SystemDefinedButtonsActionPane";

    private static str SAN_SystemDefinedFormButtonGroup = "SAN_SystemDefinedButtonsButtonGroup_Form";

    private static str SAN_SystemDefinedWorkFlowButton = "SAN_SystemDefinedButtonWorkflow";

    private static str SAN_SystemDefinedWorkdlowActionPaneTab = "SAN_SystemDefinedWorkflow";

    private static str SAN_SystemDefinedWorkflowGroup = "SAN_SystemDefinedWorkflowGroup";

    public void addSystemDefinedButtons()

    {

        next addSystemDefinedButtons();

        if (this.isFormStyleSupportedForSystemDefinedButtons())

        {

            FormActionPaneControl actionPane;

            List listOfActionPanes;

            ListEnumerator apListEnumerator;

            listOfActionPanes = this.san_GetActionPanesForSystemButtons();

            apListEnumerator = listOfActionPanes.getEnumerator();

            while (apListEnumerator.moveNext())

            {

                actionPane = apListEnumerator.current();

                this.san_AddButtonsToActionPane(actionPane);

            }

            

        }

    }

    private List san_GetActionPanesForSystemButtons()

    {

        List listOfActionPanes = new List(Types::Class);

        FormActionPaneControl actionPane;

        Object childControl;

        FormRun form = this.getFormRun();

        

        for (int i = 1; i <= form.design().controlCount(); i++)

        {

            childControl = form.design().controlNum(i);

            if (classidget(childControl) == classnum(FormActionPaneControl))

            {

                actionPane = childControl as FormActionPaneControl;

                if (actionPane.Style() == ActionPaneStyle::Standard)

                {

                    listOfActionPanes.addEnd(actionPane);

                }

            }

        }

        if (listOfActionPanes.empty())

        {

            actionPane = form.design().addControl(FormControlType::ActionPane, SANDE_SystemDefinedButtonsActionPane);

            form.design().moveControl(actionPane.id());

            listOfActionPanes.addEnd(actionPane);

        }

        return listOfActionPanes;

    }

    private void san_AddButtonsToActionPane(FormActionPaneControl _actionPane)

    {

        FormButtonGroupControl buttonGroup;

        FormMenuButtonControl menuButton;

        FormCommandButtonControl commandButton;

        FormRun formRun = this.getFormRun();

        if (this.getFormStyle() != FormStyle::Workspace)

        {

            this.SAN_AddWorkflowsTab(_actionPane);

        }

    }

    private void SAN_AddWorkflowsTab(FormActionPaneControl _actionPane)

    {

        FormButtonGroupControl buttonGroup;

        FormMenuButtonControl menuButton;

        FormActionPaneTabControl workflowTab = _actionPane.addControl(FormControlType::ActionPaneTab, this.SAN_CreateUniqueName(SAN_SystemDefinedWorkdlowActionPaneTab));

        workflowTab.allowUserSetup(FormAllowUserSetup::No);

        FormRun form = this.getFormRun();

        workflowTab.caption("Custom Workflow");

        workflowTab.hideIfEmpty(true);

        buttonGroup = workflowTab.addControl(FormControlType::ButtonGroup, this.SAN_CreateUniqueName("SAN_SystemDefinedWorkflowGroup"));

        buttonGroup.allowUserSetup(FormAllowUserSetup::No);

        buttonGroup.caption("Workflow");

        FormFunctionButtonControl menuItemButton = buttonGroup.addControl(FormControlType::MenuFunctionButton, "SAN_WorflowButton", buttonGroup);

        menuItemButton.menuItemType(MenuItemType::Display);

        menuItemButton.menuItemName(menuItemDisplayStr(<Display menu item>));

        menuItemButton.dataSource(form.dataSource());

        menuItemButton.visible(true);

    }

    private str SAN_CreateUniqueName(str baseControlName)

    {

        str candidateName = baseControlName;

        int i = 1;

        if(this.SAN_isControlFound(candidateName))

        {

            do

            {

                candidateName = strFmt("%1%2", baseControlName, i);

                i++;

            }

            while (this.SAN_isControlFound(candidateName));

        }

        

        return candidateName;

    }

    private boolean SAN_isControlFound(str controlName)

    {

        FormRun form = this.getFormRun();

        boolean isControlFound = false;

        if (form.controlId(controlName) > 0)

        {

            isControlFound = true;

        }

              

        return isControlFound;

    }

}