Check if IStringMap is already declared

[ssimop]

Supposed that an IStringMap variable has to be as "-", as in the following example :

Function tempf03

Code:

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IStringMap- label._create
label.Flags=1
err
,label.GetList(_s)
,out _s
,label.RemoveAll

sub.Add
#sub Add
IStringMap- label
label.Add("item1" "value1")

Function tempf03 is called several times by :

Function tempf04

Code:

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tempf03

tempf03

I wonder whether there exists a simpler way to check if IStringMap is already declared in temp03.

I understand that another way might have been by declaring sub-function "Add" with flag "v" :

Function tempf05

Code:

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IStringMap label._create

sub.Add
label.GetList(_s)
out _s

#sub Add v

label.Add("item1" "value1")

Any advice is mostly welcome. Many thanks in advance.

[Gintaras]

if(label=0)
,label._create

[ssimop]

Perfect and simple! Many thanks indeed.