assign and declare variables

[Silvio.Falconi]

If I load a variable as

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 &cVarName := cVarValue

I must declare before cvarname ?

I explain you

I take the variables from a extern file sample

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FUNCTION ReadFile()
    local cFileName := "table_1.dat"
    local aInfo := ReadProtectedFile(cFileName)
    local aItem,cVarName,cVarValue

FOR EACH aItem IN aInfo
    cVarName := aItem[1]
    cVarValue := aItem[2]

         &cVarName := cVarValue
NEXT


      ?c8

    RETURN NIL

When I load the file I can Know how many variables there are into

for example if there are 3 variables their names will be c1,c2,c3

How I must declare these variables before to assign the cVarValue ?

Must I use memvar?