True if the specified HTML project item is open in the Microsoft Script Editor. Read-only Boolean.
Example
This example determines whether the specified HTML project item is open. and if it is, the example then loads script from the specified file.
If ActiveWorkbook.HTMLProject.HTMLProjectItems _
.Item(1).IsOpen Then
ActiveWorkbook.HTMLProject.HTMLProjectItems _
.Item(1).LoadFromFile ("C:\MyScript.txt")
Else
MsgBox "The HTMLProjectItem is not open."
End If