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. It contains the highlight when a range is selected.)

Parameters

wParam

Must be zero.

lParam

Pointer to a RECT structure. The message fills this structure with the channel's bounding rectangle, in client coordinates of the trackbar's window.

Return value

No return value.

Requirements