I am trying to create a report which looks like a Calendar for a month. For each day, the cell has some data regarding some activity. These cells need to be colored to be highlighted. In some cases, even the text needs to be in a particular color say red. Moreover, I also want this report to be sent as an attachment (maybe an xls file) in the email. I need help to create this report and which format should I look at for the attachment part. I don't have any problem with the email part.
For e.g. something like -