[comboex] changed constructor to throw an exception when the edit control alloc fails.
[comboex]
changed constructor to throw an exception when the edit control alloc fails.

git-svn-id: 9f6a531b1eccf48281891b884df4d15f0e1b68ac@1056 17a06da3-8c20-fa79-550f-e9588e724b77

twig/dcxdll,twig/dcxdll,twig/dcxdll,twig/dcxdll,twig/dcxdll