New Post: How to write in an existing xls file ?

Hi,

I made my code working, but its too slow... it takes about 5 minutes to complete, is there a way to make it faster?
This is my code, I hope someone could help me.

If that's all you're actually doing, how big is your spreadsheet? Working with binary file formats such as Excel isn't faster, but 5 minutes seems excessive unless you're working with workbooks comprising billions of cells