Create Userform With Existing Modules?

I wrote some macros that allow me to check info when i input employee number and dates on a worksheet. There are three buttons in my macro which are "Prepare" (do some preparation for the origional data in order to perform check ups later on), "Clear" (clear info in order to perform next check up), "Check" ( Check the info that i need). I already finished the code for all three buttons and they are all functioning.

My question is how to create a userform that allows me to do the same thing as a macro. for example, on the userform window, there should also be three command buttons ("Prepare","Clear","Check") and also there should be three textbox labeled as "Employee Number","DateFrom","Date To" and the value of these textboxes are just the same as the input value for the macro( ie. In the macro, these three inputs are located at cells "B2","C2","D2")