TBM_GETTHUMBRECT Overview Group

The TBM_GETTHUMBRECT message retrieves the size and position of the bounding rectangle for the slider in a trackbar.

TBM_GETTHUMBRECT 

wParam = 0; 

lParam = (LPARAM) (LPRECT) lprc;

Parameters

lprc: Pointer to a RECT structure. The message fills this structure with the bounding rectangle of the trackbar’s slider, in client coordinates of the trackbar’s window.

No return value.