Unable to identify the Infragistics Controls and children with TestComplete

Generally speaking, read the following help topic:

https://support.smartbear.com/testcomplete/docs/app-objects/specific-tasks/modal-windows.html

More specifically, if you know that such windows are coming up and expected, you can trigger them asynchronously using the method described here

https://support.smartbear.com/testcomplete/docs/reference/project-objects/items/script/runner/callobjectmethodasync.html

Ah, I missed out checking tristaanogre reply. The link provided by tristaanogre should solve your problem :)

Hi,

   You can try the making use of the sample code provided in the smartbear forum. Below is the sample vbscript coded taken from the forum

Sub Test
Dim p, w, ResObject
...
' Calls the method that displays a modal dialog
Set ResObject = Runner.CallObjectMethodAsync(p.VCLObject("MainForm")._
VCLObject("ADialog"), "Execute")

' Simulates user actions over the dialog and closes it
Set w = p.WaitWindow("*", " ADialogCaption ", -1, 1000)
If w.Exists Then
w.Window("Button", "*Ok*").ClickButton()
Else
Log.Message("The window was not found.")
End If
' Waits for the method completion
ResObject.WaitForCompletion(5000)
' Processes the result
If ResObject.Completed Then
Log.Message("Success, Return Value: " + CStr(ResObject.ReturnValue))
Else
Log.Message("Failure, Return Value: " + CStr(ResObject.ReturnValue))
End If
...
End Sub