Unfortunately, the ExeIconFile property is only possible w/ 32-bit applications. There's no possible way to make this work in a 64-bit application. Assuming you are using .NET (C# or VB.NET), then check the "Prefer 32-bit" checkbox in your Project Settings, or specifically target your application for 32-bit (instead of Any CPU).
I'll make a note in the online reference documentation for the 32-bit restriction for ExeIconFile.
answered Sep 21 '16 at 12:23