| System Functions |
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| Format | OPT(chan[,ERR=stmtref]) Where: |
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| chan | Channel or logical file number of the file to reference. | |
| stmtref | Program line number or statement label to which to transfer control. | |
| Returns | Value used in OPT= option. | |
| Description | The OPT( ) function returns the value used in the OPT= option of the OPEN directive for the given file. If the file referred to in the OPT( ) function is not open, ProvideX returns an Error #13: File access mode invalid. If you omitted the OPT= option for an open file, the OPT( ) function returns a null string. Use this function primarily with device drivers to deal with such processes as generating banners and multiple copies. |
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| See Also | OPEN Directive. | |
| Example | 00040 ! Report OPT( ) value for open COM port: 00050 LET settings$="9600,n,8,1,x" 00060 LET port$="COM2" 00070 OPEN (1,ISZ=1,OPT=settings$)port$ 00080 PRINT OPT(1) 00090 END -:run 9600,n,8,1,x |
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