How to Apply Rounded Corners to Controls (Non-NOMADS)
PxPlus 2026 introduced the Corner Radius property, which lets you round the corners of panel controls instead of leaving them square, for a more modern look.
This tutorial shows how to apply rounded corners to buttons, standard check boxes, drop boxes, and multi-lines when not using NOMADS.
Corner rounding is controlled by the CornerRadius$ property for most controls, with two exceptions: check boxes and radio buttons.
A standard check box (with no bitmap) uses a dedicated CbCornerRadius$ property instead. Once a bitmap is added, the check box takes on the appearance and behavior of a button, and its rounding is then controlled by the CornerRadius$ property.
A standard radio button (with no bitmap) is always round and has no CornerRadius$ property. Once a bitmap is added, the radio button takes on the appearance and behavior of a button, and its rounding is then controlled by the CornerRadius$ property. Radio buttons are not covered in this tutorial.
Most list box types, except Report View and Variable List Box, also support corner rounding via the CornerRadius$ property. List boxes are not covered in this tutorial.
The table below summarizes this information based on control type:
Control Type | Property | Accepted Values |
Button | CornerRadius$ | (Null), Round, Square, or a value from 0 to 255 |
Multi-Line | CornerRadius$ | (Null), Round, Square, or a value from 0 to 7 |
Drop Box and Variable Drop Box | CornerRadius$ | (Null), Round, Square, or a value from 0 to 3 |
Check Box (with a bitmap - behaves like a button) | CornerRadius$ | (Null), Round, Square, or a value from 0 to 255 |
Check Box (with no bitmap - standard check box) | CbCornerRadius$ | (Null), Round, Square, or a value from 0 to 255 |
List Box (all types except Report View and Variable List Box) | CornerRadius$ | (Null), Round, Square, or a value from 0 to 8 |
Radio Button (with a bitmap - behaves like a button) | CornerRadius$ | (Null), Round, Square, or a value from 0 to 255 |
Radio Button (with no bitmap - standard radio button) | Not Applicable | Always Round |
Corner Rounding - Buttons
To round the corners of a button, set the CornerRadius$ property when defining the button control.
1. | Define the button control as you normally would. |
2. | Add a line to specify the CornerRadius$ property for that control ID. |
3. | Set this property to "Round", "Square", or a value from 0 to 255. Example: BUTTON 100,@(10,10,12,3)="{!Stop}" |
Corner Rounding - Check Boxes
To round the corners of a standard check box (with no bitmap defined), set the CbCornerRadius$ property when defining the check box control.
1. | Define the check box control as you normally would. |
2. | Add a line to specify the CbCornerRadius$ property for that control ID. |
3. | Set this property to "Round", "Square", or a value from 0 to 255. Example: CHECK_BOX 100,@(12,12,20,10)="Accept Terms" |
Corner Rounding - Drop Boxes
To round the corners of a drop box, set the CornerRadius$ property when defining the drop box control.
1. | Define the drop box control and load its list items as you normally would. |
2. | Add a line to specify the CornerRadius$ property for that control ID. |
3. | Set this property to "Round", "Square", or a value from 0 to 3. Example: DROP_BOX 100,@(10,15,12,8) |
Corner Rounding - Multi-Lines
To round the corners of a multi-line, set the CornerRadius$ property when defining the multi-line control.
1. | Define the multi-line control as you normally would. |
2. | Add a line to specify the CornerRadius$ property for that control ID. |
3. | Set this property to "Round", "Square", or a value from 0 to 7. Example: MULTI_LINE 100,@(10,15,10,2) |
You can use these same properties to apply rounded corners when defining controls outside of NOMADS. By using different CornerRadius$ and CbCornerRadius$ settings, you can adjust the appearance of individual controls to suit your application.
See Also
CbCornerRadius$
CornerRadius$
How to Apply Rounded Corners to Controls (NOMADS)
How to Apply Rounded Corners to Controls (Themes and Visual Classes)