Visual Basic and dll problem

[aleczz]

Im doing some mp3 ripper. In really im using RealBasic to make user interface but i think that it is not important. The user interface has made by basic and rest of it is in dll which use c. I call dll functions with declare.
At the moment i have a problem that when i call the RipCD()- function in dll, user interface has freezed until the dll return a value. And in this case it really take several minutes to rip whole cd. Only if i put some messagebox to dll pop for example in every 2 sec, it refresh the user interface in the same time.

Is there any solution to dll?

It is developed by c-language but i think that many people with visual basic have had the same problem and can solve it better.

[si_the_geek]

Thread moved to 'Other BASIC' forum, which is for kinds of BASIC other than VB (while there are similarities between VB and RealBasic, several things are very different)

[aleczz]

Ok then but if someone still have the solution for the problem even with visual basic, please tell me.

[dilettante]

It sounds as if this DLL is doing a lengthy blocking operation instead of using async callbacks or event messages. If there isn't another way to call it you need another thread - and classic VB doesn't offer this, perhaps RB doesn't either.

One hack in VB would be to create a second program to run as a second process. The main process would start and monitor this process by using API calls or a component designed for the purpose. With a little clever coding this could all be in one EXE, the first one passing a command line parameter to the "slave" process so it knows how it should act in this instance.