WTL custom control: SubclassWindow implementation

Edit a customized categories as follows:

1 class CCheckEditEx : public CWindowImpl< CCheckEditEx, CEdit >

SubclassWindow which function to achieve the following:

. 1  BOOL CCheckEditEx :: SubclassWindow (HWND the HWND)
 2  {
 . 3      ATLASSERT (== NULL :: the GetWindow (HWND, the GW_CHILD));
 . 4      IF (CWindowImpl <CCheckEditEx, the CEdit> :: SubclassWindow (HWND))
 . 5      {
 . 6                  // perform your initialization function 
. 7          InitStr ();
 . 8  
. 9          return TRUE;
 10      }
 . 11      return FALSE;
 12 is }    

Note: tag yellow part needs to be consistent.