Sets the size of the receiver's thumb relative to the
difference between its maximum and minimum values. This new
value will be ignored if it is less than one, and will be
clamped if it exceeds the receiver's current range.
@param value the new thumb value, which must be at least one and not
larger than the size of the current range
@exception SWTException <ul>
<li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
Sets the size of the receiver's thumb relative to the difference between its maximum and minimum values. This new value will be ignored if it is less than one, and will be clamped if it exceeds the receiver's current range.
@param value the new thumb value, which must be at least one and not larger than the size of the current range
@exception SWTException <ul> <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul>