Textbox Data Constraints

[Mongoose]

I am working on a project to automate some data input functions for a software package we use at work.

Some of the textboxes on the data entry forms have constraints on the text they can accept eg length of input string.

Is there any way to find out what the constraints are for a particuar control?

[AdmiralAlkex]

If it's an ordinary edit control then _GUICtrlEdit_GetLimitText(). If it's something else, then tell us what Au3Info says instead of forcing us to guess.