gettoproperty are the standard testobjectproperties that do 
not chamnge during run time...In short Property whose value 
is retrieved from the object description. 
ObjectCount = Browser("Demo of Vo Object").Page("Demo of Vo 
Object").ActiveX("VoDemoFormX").DROPDOWN
("FLIGHTS").GetTOProperty("itemscount") 

SETOPROPERTY - Modifying Test Object Properties During a 
Run Session  

CHANGING THE NAME 
Browser("Demo of Vo Object").Page("Demo of Vo 
Object").ActiveX("VoDemoFormX").VirtualButton
("button").SetTOProperty "Name", 0

'The following example uses the GetTOProperties method to 
retrieve
'the collection of properties and values used to identify 
the Calendar
'ActiveX object.

Set col = Browser("Flight").Page("Flight").ActiveX
("Calendar").GetTOProperties()

setTOproperty:
You can modify the properties of the temporary version of 
the object during the run session without affecting the 
permanent values in the object repository by adding a 
SetTOProperty statement in the Expert View. 

Use the following syntax for the SetTOProperty method: 

Object(description).SetTOProperty Property, Value

GetToProperty: Returns the value of a specified property 
from the test object description. 
Syntax: object.GetTOProperty (Property) 
Example: 
Sub GetTOProperty_Example() 
'The following example uses the GetTOProperty method to 
retrieve the 
'RegExpWndClass property from the Object Repository. 
Dim ObjectName 
RegExpWndClass = Window("Test").GetTOProperty
("RegExpWndClass") 
End Sub 

SetToProperty: Sets the value of the specified property in 
its test object description. 
Syntax: object.SetTOProperty Property, Val 
Example: 
Sub SetTOProperty_Example() 
'The following example uses the SetTOProperty method to set 
the 
'index of a window's description. 
Window("Test").SetTOProperty "Index", 2 
End Sub

GetToProperty: 
eg: a=window("Flight Reservation").WinRadioButton
("Business").GetToProperty("checked") 
 msgbox a

SetTOProperty:
Suppose in first build, it was "OK" button and now in the 
modified buit it is "Yes" button.
you need to change the button name.
window("-----").WinButton("OK").SetTOProperty "Text", "Yes"

This will change the button name to "Yes".

Hope this helps....