Any free macros / VBA for Solving Arc, chord, radius & angle, then output as text?

I am constantly doing layouts that involve using Arc, radius, chord & angle, where two of those are known, and the other two are unknown (needs to be either layout or manually calculated).    I already have an excel spread sheet to doing something similar.    I was just curious if there are any programs out there that do any kind of arc, chord & angle type of manipulation.   For example, where it prompts you for a radius (the user would either input a radius on the number keypad or could measure/select two point in the drawing as input radius).   then it would prompt you for either a chord or angle in the same manner.    Then it would generate the solution as a text.  

It's a lot quicker to input arc or angle, with a click of a mouse, then inputting into excel (and possibly making a typing mistake);  and having to measure radius, or angle, then transcribing it to excel into the appropriate cell to solve the unknowns variable.    Then having to copy the results, back to microstationas text.   I am sure, I am not the only one that has ever needed such a program, and was just curious if there was one already written by someone (or something similar relating to solving for arc, chord, radius or angle).    Thanks