Bitmap-Width
This property identifies the width in pixels of the image displayed in the Push-Button control. The bitmap strip identified by the Bitmap-Handle property is divided into several smaller images. The width of each image is the value assigned to this property.
If this property is omitted, then the Size property is used to specify the width of the image.
 
Example - Define a push-button using different bitmap images for different states of it
screen section.
...
  03 screen-1-pb-1 Push-Button
     line 4.5
     column 8.1
     size 70
     lines 48
     id 1
     bitmap-handle icon-png
     square
     bitmap-default 21
     bitmap-disabled 18
     bitmap-rollover 19
     bitmap-pressed 20
     bitmap-width 18
     .