I have a com object developed with the Intel compler for Fortran that performs a long running process. I have succeeded in starting this proces in a seperate thread from the UI but I cannot get a callback from it. I can have it write to a global variable with a result but I would need a timer on a form to keep checking for this result. I would prefer a more elegant solution. I tried using the backgroundworker class and the code compiles and runs but I receive this exception after the com object is created at the first reference to any of the objects properties: