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11/30/2001 at 03:49AM PST, ID: 20242319
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7.2

Knowing when a file is ready to read

Asked by liljegren in Visual Basic Programming

Tags: pdf

Last question I asked was about knowing when a process ends in Windows. Got that working now, but obviously it's not the same as knowing when a file is ready to read.

I have two command line programs running from the Shell function. The output of the first is the input of the second, and the output of the second is the input of Adobe Acrobat. The program is expected to open the PDF file automatically when it's finished.

Although I have learned the method now for knowing when a process is finished, it takes a moment after that before the PDF is "filled" completely.

' Continue when Shell process is finished
Do While IsActive(hInst)
    DoEvents
Loop
MsgBox "Finished!"

In this case the messagebox comes up while the PDF is still on 0 bytes. When the PDF is ready, it is opened with the ShellExecute API function. Now, Acrobat complains about a sharing violation, because the file isn't ready to read.

At least, this won't work:

Do While FileSize = 0
    DoEvents
Loop

Any other ideas?
[+][-]11/30/01 05:26 AM, ID: 6661783

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[+][-]11/30/01 05:40 AM, ID: 6661804

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[+][-]11/30/01 08:43 AM, ID: 6662306

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About this solution

Zone: Visual Basic Programming
Tags: pdf
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Solution Provided By: VK
Participating Experts: 7
Solution Grade: A
 
 
[+][-]02/05/02 12:23 PM, ID: 6780551

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[+][-]05/18/02 04:05 PM, ID: 7019001

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[+][-]08/26/02 09:25 PM, ID: 7244196

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[+][-]09/08/02 11:44 AM, ID: 7271054

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