Difference between revisions of "Virtual Entry Station (VES)"
m (changed category) |
m |
||
| Line 1: | Line 1: | ||
| − | + | Virtual Entry Station (VES) allows a CLI-like approach to the system from any task or library. VES permits access to virtually any system property. The application developer must take into account that, unlike regular programs and libraries, the string is passed to VES and interpreted and translated at run-time. Execution takes much more time than the equivalent line in the program. | |
| − | The response of VES is ASCII | + | The response of VES is an ASCII string that can be immediately printed or assigned to any string variable. Since VES involves translation and then interpretation, the result can also be an error message. To distinguish between a normal response and an error, VES attaches either a “D:” or an “E:” prefix to the output. |
VES Example: | VES Example: | ||
<pre> | <pre> | ||
Program | Program | ||
| − | |||
Dim s2 as string | Dim s2 as string | ||
| − | |||
Dim s1 as string | Dim s1 as string | ||
| − | |||
S2="?sys.time" | S2="?sys.time" | ||
| − | |||
S1=VesExecute(s2) | S1=VesExecute(s2) | ||
| − | |||
Print s1 | Print s1 | ||
| − | |||
S1=VesExecute(“sys.time”) ‘ incorrect, returns syntax error | S1=VesExecute(“sys.time”) ‘ incorrect, returns syntax error | ||
| − | |||
Print s1 | Print s1 | ||
| − | |||
End program | End program | ||
| − | |||
| − | |||
Output: | Output: | ||
| − | |||
D:18:27:19 | D:18:27:19 | ||
| − | |||
E:Error: 7039, "Syntax Error", Module: Translator | E:Error: 7039, "Syntax Error", Module: Translator | ||
</pre> | </pre> | ||
Revision as of 13:46, 24 March 2014
Virtual Entry Station (VES) allows a CLI-like approach to the system from any task or library. VES permits access to virtually any system property. The application developer must take into account that, unlike regular programs and libraries, the string is passed to VES and interpreted and translated at run-time. Execution takes much more time than the equivalent line in the program.
The response of VES is an ASCII string that can be immediately printed or assigned to any string variable. Since VES involves translation and then interpretation, the result can also be an error message. To distinguish between a normal response and an error, VES attaches either a “D:” or an “E:” prefix to the output.
VES Example:
Program Dim s2 as string Dim s1 as string S2="?sys.time" S1=VesExecute(s2) Print s1 S1=VesExecute(“sys.time”) ‘ incorrect, returns syntax error Print s1 End program Output: D:18:27:19 E:Error: 7039, "Syntax Error", Module: Translator