From QB64.org wiki
Usage: $INCLUDE: 'QB.bi'
- $STATIC denotes that all arrays can only be dimensioned once using DIM.
- $DYNAMIC denotes that all arrays can be redimensioned using REDIM ONLY.
- $INCLUDE includes a BI file or Qbasic Library in a program. The file name requires a comment before and after the name.
- The string variable suffix MUST be used if the variable is not dimensioned in a DIM statement. The statement can also set a fixed string length.