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Need to read string from serial port for bar code app
Message
From
02/05/2002 16:33:17
 
 
To
02/05/2002 15:37:36
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
00651375
Message ID:
00652113
Views:
21
Thanks! Now I have everything I need.

>David, answers inline:
>
>>Jim,
>>
>>This looks like it will do the trick. Thanks! A couple of questions though:
>>
>>1) Where can I get more documentation on the mscomm32.ocx properties and methods? Is the same as the "Microsoft communication Control version 6.0 - activex control.
>>
>
>That is indeed the control in question. Documentation should be in comm98.chm, included somewhere in the MSDN install. Nor great, but should be adequate.
>
>>2) Where can I get more documentation on the vfpcom properties and methods? Where is this class/utility defined?
>>
>
>This is a download available at http://msdn.microsoft.com/vfoxpro/downloads/updates.asp. Docs and examples included.
>
>>3) I assume that I should make calls to the incomm class's oncommm method, inside the loop. I am assuming based on the code that the loserin object's input property holds the stream of characters. The documentation for the activex control says that:
>>input is write only and that it:
>>
>>'returns and removes a string of characters from the receive buffer'
>>
>>Do you have to clear loserin.input, or does it automatically get cleared when you read it?
>>
>
>Loserin.input takes care of clearing inself when accessed.
>
>>4) I know that doevents is supposed to 'execute all pending windows events'. Could you explain what it is doing in this context here?
>>
>>TIA
>
>In my informal testing here, with short 'scanner' type of inputs, it's effect is minimal. With larger data transfers, your processing loop could tie the machine up pretty tight - unresponsive. Do some testing with your data and see if David's fastdoevents() thingy improves it any. Nothing worse than pushing the mouse and no cursor movement :>)
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