fatal exception error in windows 98

i have already created a dll library and a simple function in the library

i want to call the funtion like an api function

To call that function how i register the dll file in the registry ?

how take backup using vb code

i want to use dll files in different directory (customized by user)
and all functions in the dll must call with out reference

i want to set the path of dll files in many folder how can i do it

i am a beginner in vb 6.0
i like to use crystal report in vb 6.0 insted of data report i serched in vb 6.0 for crystal report but ican't found Please help me.....