Hi,

Thank for your advise, will look into this area.
BTW, my definition of not work mean when in the VFP IDE,
my application senting command to the device and able to
get the device response back through the RS232.

However, when run as a standalone executable file, it
does not get response back from the device.

>>Hi,
>>
>>I am evaluating some wireless device with VFP6 SP5 written
>>application.
>>
>>When my application running under the VFP IDE, it working fine.
>>However, when I compiled it as executable file, it does not
>>work. I am doing some RS232 serial communication with the
>>wireless device.
>>
>>It seem like after compilation, my executable
>>application output data to RS232 is different from those output data
>>when in IDE mode by tapping the signal from my application to monitor it.
>>
>>I am confused, any advise or comment to assist me.
>>
>>Thank in advance.
>
>Review the help topics for _VFP.AutoYield and DOEVENTS. You could be having problems with wait states and ActiveX control processing.
>
>HTH.