disable copy/paste

BOOL CMyEdit::PreTranslateMessage(MSG* pMsg) 
{
// TODO: Add your specialized code here and/or call the base class

// disable paste by mouse or keyboard
switch( pMsg->message )
{
case WM_KEYDOWN:
{
switch( pMsg->wParam )
{
case 0x56:
{
if( GetKeyState(VK_CONTROL)<0)
return true;
}
break;
}
}
break;

case WM_RBUTTONDOWN:
{
return true;
}
break;
}

return CMyEdit::PreTranslateMessage(pMsg);
}