How i do one double click in C# scrit?

I'm testing one application that you double click in an textbox and that allows you to insert a price.

This is my script:

My function:

function SetValue(ValueGroupPerson)
{
var txtBoxValueGroupPerson = Properties["GetTxtBoxValueGroupPerson"]();
txtBoxValueGroupPerson["DblClick"];
txtBoxValueGroupPerson["Keys"](ValueGroupPerson);

The map object:

function GetTxtBoxValueGroupPerson()
{
return Sys["Process"]("XXXXXX")["WinFormsObject"]("Frm_Menu")["WinFormsObject"]("MdiClient", "")["WinFormsObject"]("Frm_Values")["WinFormsObject"]("Panel1")["WinFormsObject"]("Panel2")["WinFormsObject"]("Value")["WinFormsObject"]("Values");
}

This is the error:

"Object doesn't support this property or method"

Somebody can help me?
Thanks.