TBM_GETCHANNELRECT  21AWJC8 

The TBM_GETCHANNELRECT message retrieves the size and position of the bounding rectangle for a trackbar s channel. (The channel is the area over which the slider moves and which contains the highlight when a range is selected.)

TBM_GETCHANNELRECT
wParam = 0;

lParam = (LPARAM) (LPRECT) lprc;

Parameters

lprc

Pointer to a RECT structure that contains the size and position of the channel s bounding rectangle when the function returns.

Return Values

No return value.

See Also