The TBM_SETRANGE message sets the range (minimum and maximum positions) for the slider in a trackbar.
TBM_SETRANGE
wParam = (WPARAM) (BOOL) fRedraw;
lParam = (LPARAM) MAKELONG(lMinimum, lMaximum);
Parameters
fRedraw
Redraw flag. If this parameter is TRUE, the slider is redrawn after the range is set.
lMinimum
Minimum position for the slider.
lMaximum
Maximum position for the slider.
Return Values
No return value.