WorksheetFunction.SqrtPi (Excel)
Returns the square root of (number * pi).
If number < 0, SqrtPi returns the #NUM! error value.
SqrtPi (Arg1)
Arg1: Number - the number by which pi is multiplied.
Dim dblSqrtPi As Double
dblSqrtPi = WorksheetFunction.SqrtPi(Arg1:=)