How to link a Qt .exe to a dll dynamically?

[high_flyer]

and

Segmentation fault occurs when data from dll memory is passed to exe memory using stl vector .

This is in runtime, which means the danymic linkage is resolved ok.
It seems you have a problem in the implement ion, either of the lib, or in your application, probably in your application, you are trying to access a NULL obj (your vector) or maybe you go over the vector bounds or similar.