I have a vfp 7 application which allows to run multiple instances
by clicking the application icon many times.

Starting a second instance is allowed only after first
instance of my application is fully loaded.

Unfortunately, some users click my application icon rapidly.
How to check that another instance of my application is currently loading
and exit second instance in this case ?

I need to set some flag (mutex ?) at startup and clear this flag after
application is fully loaded.

At startup, second instance must check this flag and terminate if another instance loading is in process. How to implement this ?