Problem: Wrong expression return??

Goodday everybody...

Igot another problem, which is very weird to me...
Well, I created a DLL using VB. In the DLL, there's one expression statement, which is in a loop and I wanted to run the loop until the expression is FALSE. When I link the DLL with a VB written program, it run ok, meaning the expression will give the right value when tested. But when I link the DLL using VC++ written program, the expression always return TRUE even when it's suppose to be FALSE.

All I want to ask is... What really happen in the DLL code? Why can't it test the expression correctly? And how do I solve it?

Well, post the loop with the expression so we can see what's wrong.

well this is the loop part of the program:

Do
sFileLine = f.ReadLine
sTextLine = Left(sFileLine, 9)
Loop While (sDBName <> sTextLine)

NOTE: sDBName is a string parameter received from calling statement. sFileLine is a line read from a text file.

For the expression (sDBName <> sTextLine), it always return TRUE even when both values are the same. That why I can't get out of the loop.