call active x dll from script use debugger

i have a dll that is called from vbs, passing parameters to it. would like to run the dll in the debugger, is there some way to do this and set the parms that are passed to the dll? in the dll there is a function that is called from the script as the entry point and parms are passed to that function
so vbs has
retVar = dllName.funcName(parm1, parm2)
if nothing else i suppose i could put in a test entry point, that i can set a break at, and then set vars in the debugger before calling the 'real' entry point function, would prefer to simulate the actual call from the vbs script
bob