Hello,

I'm looking for ideas on how I might go about coding a subtraction procedure. I have four textboxes. Textbox1 has a value of 100. Textboxes2-4 are zero. If I enter a value in either textboxes2-4 that value is subtracted from Textbox1. There is a limit. Textbox1 must never be less than 0. The user can either receive a MessageBox or further entry is prohibited. I would prefer a MessageBox alert.

I have attached a Userform1 as reference. Book1.xlsm

Thank you in advance.

Gal.