Tracy and all,
I am trying to develop some competence with API calls so I setup a simple
bench mark and had the Performance tab on Task Manager up while I ran
several tests. Here is the test routine:
* Test DoAndWait performance
* Save the start time
m.StTm = VAL(SYS(2))
* Do the call - Uncomment the one being tested
?DoAndWait("c:\windows\system32\notepad.exe Contents.txt", "NOR")
*?DoAndWait("c:\windows\system32\cmd.exe /c dir c:\ /s", "HID")
*?DoAndWait("c:\windows\system32\cmd.exe /c dir c:\ /s>Contents.txt",
"HID")
* report the elapsed time
?ALLTRIM(STR(VAL(SYS(2)) - m.StTm)) + ' Seconds this run'
I tried the inkey(.1) both before and after the DO EVENTS line. I could
not tell any difference in the CPU utilization with or without the
inkey(.1) enabled in the code. The directory scan run durations were
also the same with or without the inkey(.1).
I was surprised to see that the directory redirected to a file ran in 5
or 6 seconds while the one going nowhere took 11 or 12 seconds.
I would be glad for an explanation of what is causing these results but a
grateful that I can at least achieve them now.
I stumbled across the "cmd.exe /c dir" syntax as a way to execute an
internal command but have never found any documentation about when this
is necessary. Where can I find this information?
It appears that one needs to convert long filenames to the 8.3 format
before passing them as parameters on a command line to the CreateProcess
routine. Is this something that applies to all API calls?
Thanks to all who helped me with this,
Joe
On Friday, February 18, 2011 6:08 PM, Tracy Pearson wrote:
>
>Date: Fri, 18 Feb 2011 18:08:05 -0500
>From: Tracy Pearson
>To: [email protected]
>cc:
>Subject: RE: Getting a complete file list from a removable disc into VFP
>
>Joe Yoder wrote on 2011-02-18:
>> Tracy,
>>
>> I believe every version of code I have looked at uses the routine
>> listed here. Can you be more specific about where the sleep or inkey
>> should be added?
>>
>> Thanks - Joe
>>
>
>Joe,
>
>With the DoEvents command, before or after.
>
>Tracy Pearson
>PowerChurch Software
>
>
>
>
[excessive quoting removed by server]
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