How to replace an CMFCPropertyGridCtrl with a new one inside CDockablePane - c++

Question

i have created CMFCPropertyGridCtrl inside an CDockablePane and i want to replace this CMFCPropertyGridCtrl with a new one, then i override OnEraseBkgnd.
OnEraseBkgnd called only in the application start, and when i want to call it by Invalidate or InvalidateRect it didn't fire.
How can i call OnEraseBkgnd?
Thanks in advance.
void CCL2PropertiesPane::HostPropertyGridControl(CMFCPropertyGridCtrl* pPropertyGridControl)
{
if(NULL == pPropertyGridControl)
return;
if(m_pPropertyGridControl)
RemoveCurrentPropertyGridControl();
m_pPropertyGridControl = pPropertyGridControl;
SetWindowText(m_pPropertyGridControl->GetName());
CRect clientRectangle;
GetClientRect(&clientRectangle);
m_pPropertyGridControl->Create(WS_CHILD | WS_VISIBLE, clientRectangle, this, PROPERTIES_DOCKABLE_PANE_ID);
}
//--------------------------------------------------------------------------------
void CCL2PropertiesPane::RemoveCurrentPropertyGridControl()
{
m_pPropertyGridControl = NULL;
SetWindowText(GetPaneName());
CRect clientRectangle;
GetClientRect(&clientRectangle);
//here i want to call OnEraseBkgnd
InvalidateRect(clientRectangle);
//Invalidate();
}
//--------------------------------------------------------------------------------
BOOL CCL2PropertiesPane::OnEraseBkgnd(CDC* pDC)
{
CRect clientRectangle;
GetClientRect(&clientRectangle);
CBrush whiteBrush(RGB(250, 250, 250));
pDC->FillRect(clientRectangle, &whiteBrush);
return TRUE;
}

Answer 1

Add ON_WM_ERASEBKGND to CCL2PropertiesPane's message map to properly erase the background. Or move the FillRect function in to OnPaint.
Regarding:
void CCL2PropertiesPane::RemoveCurrentPropertyGridControl()
{
m_pPropertyGridControl = NULL;
...
}
Above code is appropriate for initialization, but it doesn't remove or destroy anything. The control is still there, it only makes the program forget how to find the control. To hide the control use:
m_pPropertyGridControl->ShowWindow(SW_HIDE);
To destroy the control use DestroyWindow(), but that's not recommended with above setup.