Hi.

I need to do something that it's a little dificult to explain....
Please be patient :)

I have a control (my control is a calculator).
This control returns a value (the result).

I need that:
If when i call this control (from a menu), there is a cell, a textbox,
or any control that it's editable focused (active in the form), then
the text of that control has to be fill with the calc return value.

My control shoukd work as the input panel works... If a textbox it's
focused, when you touch the letters of the input panel, they are
showed in the textbox..... The same happens if a grid's cell is
focused, then that cell is filled when you press the input panel
buttons.

My calc control has an "OK" button, I want that when i press that
button, if a textbox in my form is focused, the the text property of
this textbox must be the calc result.

What I need to know, is if there is a way to call to some P/Invoke or
something like that from my control, and then the problem is solved.
Or if I need to do something diferent. I think that my control should
work similar to the input panel (when the input panel fills the text
property of some control)

Thanks a lot for your time!