report control in dialog

I have 1 report control in dialog.

I do not receive message from report control.

(click, double click message....)

XXXDlg.h file

message map declare.

protected:

 afx_msg void OnReportItemClick(NMHDR *pNotifyStruct, LRESULT *result);
 afx_msg void OnReportItemRClick(NMHDR *pNotifyStruct, LRESULT *result);
 DECLARE_MESSAGE_MAP()

XXXDlg.cpp file

BEGIN_MESSAGE_MAP(CEventLogDlg, CBkColorDlg)

 ON_NOTIFY(NM_CLICK, XTP_ID_REPORT_CONTROL, OnReportItemClick)
 ON_NOTIFY(NM_RCLICK, XTP_ID_REPORT_CONTROL, OnReportItemRClick)

END_MESSAGE_MAP()

void CEventLogDlg::OnReportItemClick(NMHDR *pNotifyStruct, LRESULT * /*result*/)
{
 XTP_NM_REPORTRECORDITEM *pItemNotify = (XTP_NM_REPORTRECORDITEM *)pNotifyStruct;

 // todo: ...
 // ...

}

Why not receive the message from report control?

2. size gripper problem.

I changed background color of dialog in WM_ERASEBKGND and WM_CTLCOLOR.
But size gripper's color was not changed.

What should I do?

thanks.