The message in what method can get QQ2007 dialog interface excuse me inputs the Class of casing?

I want to be gone to with the program QQ group (already the hand is moved open) message input casing inputs a character,

I search so:
PublicstaticexternIntPtrFindWindowEx(IntPtrhwndParent, intPtrhwndChildAfter, stringlpszClass, stringlpszWindow);

But how can these two values just get LpszClass and LpszWindow? Spy The receives information draw a frame round that SPY gets and the casing that input information are RichEdit20A:(Kind the name is fixed. It is OK to be checked with Spy so