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

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	Commctrl.h