The name VBLM gives an instance can take one of several forms:
If the string instance is a control property set in a form definition section, the name will be ControlName.PropertyName or ControlName(IndexNumber).PropertyName.
If the property was extracted from an FRX file, the name will be ControlName.FRX_PropertyName (See String Properties and FRX files).
If the string instance is a string found in a declarations section (ie a constant definition), the name will be Declarations_S##, where ## is a number indicating the sequence in which it was defined (the first string found is 1, and so forth).
If the string instance is a string found in a sub or function procedure, the name will be ProcedureName_S##, where ##, as above, is a number indicating the sequence in which it was defined.
If the Show File Names display option is checked, all of these names will begin with the name of the string instance's source file.