You could calculate your window+shading properties using LBNL window or following EN ISO 52022-3:2017, and input them as a WindowMaterial:SimpleGlazingSystem. Depending on what you are after, this could be accurate enough as far as I know.

Then, you can use the EMS to switch between the construction assigned to your window with the EnergyManagementSystem:ConstructionIndexVariable.

Rafael