Handle calendar date click

[kaprot]

I'm using AutoIt to automate the use of a Word plugin written in .NET.

It's a simple form with some controls on it but I can't find a direct way to fill textboxes, select checkboxes, etc. AutoIt Info doesn't show any infomation about the form and its controls.

So I'm working with mouse and keyboard simulation. I have no problem with textboxes and checkboxes but I don't know how to select a date in a calendar control.

It looks like this one, with no date field/box to fill.

Is there a simplier way than to write a long and complicate algoritm to click the right date (day-month-year)?