callback

  1. J

    Resolved Need help with adapting C DLL function prototype to VB.Net

    Hi all, I am creating the vb.net application based on C described DLL. I am trying to solve the problem with declaration and using callback function which causing AccessViolationException: The original callback function prototype: typedef void(* NOTIFY_FUNC) (uint32_t MsgId, uint32_t wParam...
  2. F

    Issue with error handling in callback

    New to asynchronous calls, in this case using a call back. The code below works. The code is calling a rather rudimentary web service which returns xml. If the service returns xml the code works fine and msresponse is filled with the xml and the funcion "GetWebserviceData" is able to return, to...
  3. A

    How to declare callback function and pass as paramater to function

    I'm using a function in a third-party DLL library that takes a callback function as a parameter. The library was written and C#, but it seems to be perfectly compatible with VB. The only problem I'm having is figuring out how to pass one of the functions a callback function. Here is how the...
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