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GetPvProfString()
Return a string from an entry in an application's initialisation file
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Syntax
GetPvProfString( <cSection>, <cEntry>, <cDefault>, <cFile> )   -->   cValue

Arguments
<cSection> is the name of a section in the initialisation file.

<cEntry> is the name of an entry within the <cSection> section
in the file.

<cDefault> is a string to use if the specified entry is not
found.

<cFile> is the name of the file.  If no path is specified, the
Windows directory is searched.

Returns
If the entry is found, its value is returned.  If the entry is
not found, the <cDefault> value is returned.
If <cEntry> is a null string (""), all entries for <cSection>
are returned, separated by null (chr(0)) bytes.

Description
This function is like GetProfString(), except the
application's private file is searched.

Example
// Suppose APP.INI contains:
//        [ClipApp]
//        level=expert
? GetPvProfString( "ClipApp", "level", "novice", "app.ini" )
// result: expert