TBM_SETTIC    
The
TBM_SETTIC message sets the position of a tick mark in a trackbar.
TBM_SETTIC 
wParam = 0; 
lParam = (LPARAM) (LONG) lPosition; 
 
Parameters
lPosition
Position of
the tick mark. This parameter must specify a positive value.
Return Values
Returns TRUE
if the tick mark is set or FALSE otherwise.
Remarks
A trackbar
creates its own first and last tick marks. An application should not use this
message to set the first and last marks.