TBM_SETRANGEMAX Overview Group

The TBM_SETRANGEMAX message sets the maximum logical position for the slider in a trackbar.

TBM_SETRANGEMAX 

wParam = (WPARAM) fRedraw; 

lParam = (LPARAM) lMaximum;

Parameters

fRedraw: Redraw flag. If this parameter is TRUE, the trackbar is redrawn after the range is set. If this parameter if FALSE, the message sets the range but does not redraw the trackbar.
lMaximum: Maximum position for the slider.

No return value.

If the current slider position is greater than the new maximum, the TBM_SETRANGEMAX message sets the slider position to the new maximum value.