Deregister a widget from its parent for anchoring
void PtAnchorDeregister( PtWidget_t *widget );
This function deregisters widget from its parent. This prevents widget from being included in anchoring operations.
The deregister operation is done automatically when the anchor flags are cleared. You'll need to use this function only if you take over the Pt_ARG_ANCHOR_FLAGS and Pt_ARG_ANCHOR_OFFSETS resources.