C/C++ Source Code and Scripts Downloads Free - Hawkeye Computer Graphics Projects in C++, PDF417 Decoder SDK/LIB, Code39 Decoder SDK/Android, HS. Using the Communications Control. The Communications control allows you to add both simple serial port communication functionality to your. As a Visual Basic.

Sorry, I can't point you to an idiot's guide, as I haven't really seen any either. But I can maybe give you a little insight from my experience. Which at times has involved some idiocy. There are libraries and packages you can buy that may be a lot more graceful, but if you don't mind a little grunt work here is a brief example to get you started. The only way I've done serial communications using VFP so far has been with the Microsoft MSComm control.

I would just start with some simple little test project to get a bit comfortable. Create a form and drop an instance of the comm control on it. You can get access to it in the usual way, from the Tools->Options->Controls->Microsoft Communications Control.

This will add it to your form controls Active X controls dialog. In the form's 'Init', add this statement: _VFP.AUTOYIELD =.F. In your comm control's 'Init', put something like this. CODE IF (THIS.commEvent == 1) &&. Xmit *THISFORM.iTx.PICTURE = 'dead.ico' &&. Turns off LED after command button turned it on RETURN ENDIF &&.

Something residual in the buffer IF THIS.InBufferCount >0 AND THIS.commEvent # 2 IF THIS.commEvent >1000 &&. Some sort of comm error. Close, reopen, re-init This.PortOpen =.F. DOEVENTS x = INKEY(1, 'HM') THIS.Settings = '9600,N,8,1' THIS.RThreshold = 1 This.SThreshold = 1 THIS.InputLen = 100 THIS.inBufferSize = 1024 THIS.CommPort = THISFORM.nPort DOEVENTS x = INKEY(1, 'HM') ENDIF RETURN ENDIF &&. We have data, let's react to it IF (THIS.commEvent == 2) DO WHILE THIS.InBufferCount >0 cInString = THIS.INPUT DOEVENTS x = INKEY(.1, 'HM') DO CASE *. If we get a ACK, send ENQ CASE ASC(cInString ) = ACK THIS.OUTPUT = CHR(nENQ) DOEVENTS x = INKEY(.1, 'HM') *.

If we get a ENQ, send ACK CASE ASC(cInString ) = nENQ THIS.OUTPUT = CHR(ACK) DOEVENTS x = INKEY(.1, 'HM') OTHERWISE *. Otherwise, concat the buffer THISFORM.cInString = THISFORM.cInString + cInString ENDCASE ENDDO &&. Here, you can respond to whatever you receive, parsing the data or values and dealing with them. Is the string all there? Is there an end-of-string, CRC.

RETURN Hope that helps a little. -Dave Summers- Even more Fox stuff at: RE: Serial port comms.

Serial Communications Library for Visual FoxPro: Visual FoxPro serial port library, serial component, Visual FoxPro serial control Serial Communication Library for Visual FoxPro, serial port component, serial port control, virtual serial ports, usb serial and RS232, RS422, RS485 software tool for Visual FoxPro. Windows Standard Serial Communication Library for Visual FoxPro The Marshallsoft serial communications component library for Visual FoxPro (WSC4FP) is a serial port library based on the Windows serial comm API. WSC4FP uses the core Windows API to communicate with any device connected to a serial port from within a Visual FoxPro application. A simple interface allows accessing data from a serial port using RS232 or multi-drop RS422 / RS485 serial ports. WSC4FP also supports virtual ports such as those created by Bluetooth and USB/serial converters.

WSC4FP provides the capability to quickly write Visual FoxPro applications to control serial devices such as barcode scanners, modems, lab instruments, medical devices, USB serial devices, scales, GPS navigation, etc. The component library includes 49 functions plus serial line status & control, modem control, ASCII/XMODEM/YMODEM protocols, and a good selection of Visual FoxPro example programs. The library can be used with any 32-bit version of Visual FoxPro. Features include: • Free technical support and updates for one year.

• Royalty free distribution with your compiled application. • Implemented as a 32-bit DLL (WSC32. How Much Do Monster Jam Truck Drivers Make. DLL).

• Evaluation versions are fully functional. No unlock code is required. • Includes over 49 functions plus modem control.

• Can control any serial device (scale, barcode reader, etc.) connected to a serial port. • Can be used from GUI mode or console mode programs.

• Can control multiple ports simultaneously. • Can be used with virtual serial ports using Bluetooth serial or a USB to serial converter. • Supports RS232, and multidrop RS422, and RS485 ports. • Includes hardware and software flow control. • Supports character peek (SioEventChar).