Dll??

I want to create a dll that acts like an input form.
I would like to beable to pass the dll 3 variables to set the title of the the input box, a prompt label and give the input text box a default value. I would also like the dll to return a value when the user has either clicked an ok of cancel button is this posible??

Any help or advise would be nice

Read the Visual Studio help and samples on UserControl.
What you want to make is an ActiveX custom control.

Also there are both tutorials at this site on ActiveX controls, and this particulat forum has had LOTS of posts on the same subject. Search for 'usercontrol'.