CallSub allows you to dynamically call a sub, which means that the called sub is only
known at runtime.
Syntax: CallSub (Sub Name [, Arguments List])
Sub Name - A string that holds the target sub name.
Arguments List - List of arguments passed to the sub (separated by commas).
CallSub is limited to subs with up to 3 String parameters (called ByVal).
Example:
For i = 1 to 3
If CallSub("SomeSub" & i, arg1, arg2, arg3) > 10 Then ...
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