I have a program that I have been working on for a number of years. There is constant changes needed. Anyway the dll's that I bought some time ago are now out of date.

When a client has by program installed on their computer and then installs or already has installed a program with the same DLL's that I used but newer versions my program blows up.

Is there a way I could use my old DLLs and allow them to coexist with newer dll's????

The vender wants more $$$ for the upgraded dll's BUT they do nothing more for me, the ones I have work perfectly preform the job correctly and I dont want to shell out more $$$ for something that works....

Its a pain when there is not alot of money.