Help inputting a function into a series of cells in Visual Basic

[Rosadocc]

Hi. I am very new to using Visual Basic but I am hoping someone can help me in inputting my function into cells on multiple sheets so that the user can input data in the cells but won't interfere with the function. I have a IF(ISBLANK function that I would like to use on cells K211:K261. How can i write the code for this to put in Visual Basic?

[Dennis7849]

For this work, you do not need VBA. See the example attached.