VB.NET Windows App - Optional Sub Parameter byRef Object default no reference
I have a VB.NET Sub routine with 3 parameters. The last is " ByRef Optional ilsList As ImageList".
What the routine does internally varies, depending on whether it is called with an ImageList reference. I therefore need to be able to check if this parameter was called.
I guess I need to assign a DEFAULT value to this reference... not sure how to do this. I assumed maybe assigning NULL would work and allow me to do an ISREFERENCE() check against the ilsList object. But this doesn't seem to work.