CHECK

Syntax oops = CHECK(‘name’)
Location DJToolkit 1.16

If name is a currently loaded machine code procedure or function, then the variable oops will be set to 1 otherwise it will be set to 0. This is a handy way to check that an extension command has been loaded before calling it. In a Turbo’d or Supercharged program, the EXEC will fail and a list of missing extensions will be displayed, a QLiberated program will only fail if the extension is actually called.

EXAMPLE

1000 DEFine FuNction CheckTK2
1010   REMark Is TK2 present?
1020   RETurn CHECK('WTV')
2030 END DEFine