By default, the ExtendedWidth property is "Width", which specifies that the split bar is using the "Width" property of the extended control to get or set component's width. Extended controls may be implemented by OLE control containers to provide a wrapper for contained controls.

The /COM version may use the following properties:

• ExtendedLeft property specifies a list of property names separated by comma character, that indicates the Left property of the extended control. The Left property of an extended control gets or sets the distance, between the left edge of the object and the left edge of its container
• ExtendedTop property specifies a list of property names separated by comma character, that indicates the Top property of the extended control. The Top property of an extended control gets or sets the distance, between the top edge of the object and the top edge of its container
• ExtendedWidth property specifies a list of property names separated by comma character, that indicates the Width property of the extended control. The Width property of an extended control gets or sets the control's width
• ExtendedHeight property specifies a list of property names separated by comma character, that indicates the Height property of the extended control. The Height property of an extended control gets or sets the control's height.

to determine/change the location/size of the component on the form/dialog/window.

The /NET version uses the following properties:

• Left, Top, Width and Height to determine the location and size of the component on the form
• SetBounds method to change the location and size of the component on the form

This property is not available for the /NET version.