rem: void WMSetRulerReleaseAction(WMRuler * rPtr, WMAction * action, void *clientData)
add: WMSetRulerReleaseAction(WMRuler * rPtr, WMAction * action, void *clientData)
context: void WMSetRulerReleaseAction(WMRuler * rPtr, WMAction * action, void *clientData){    if (!rPtr)    return;    rPtr->releaseAction = action;    rPtr->clientData = clientData;}