Newb questions

Jan 27, 2014 at 5:36 PM
Edited Jan 31, 2014 at 4:26 PM
Edited:

I had asked several questions here but I found answer to many of them, so I edit this post to help people who search for these words:

I had problem of null reference when trying to read TabColorIndex.

Solution: tab sheet doesn't have any color before you set a color to it. This is true even if you create your file by microsoft excel. the gray color that you see in excel is a default color without being saved in excel file.

Hope it helps others
Marked as answer by AlirezaAhmadiRad on 1/29/2014 at 12:41 PM