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Sorry about this - I forgot about it during the &quot;great outage&quot;. :-)<br />
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Although I found a different (less API intrusive) method of accomplishing what I needed to do, this was just what I needed for what I asked about. &nbsp;Thanks!
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Sorry about this - I forgot about it during the "great outage". :-)

Although I found a different (less API intrusive) method of accomplishing what I needed to do, this was just what I needed for what I asked about.  Thanks!

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Thanks for points, glad I could help you
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I am looking for approaches to intecepting the call between a printer and a memory-resident program on a Win9x system.<br />
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We are using HP Laserjet 3150 and 3200 multifunction printers. &nbsp;I am trying to intercept the 'pop-up' call that loads the Jetsuite front-end whenever paper is placed into the 3150's Scan/Fax tray, and pop up a VB program instead of the default program. &nbsp;If there is already a TWAIN session open on the PC, then the pop-up doesn't happen. &nbsp;If not, it will happen. &nbsp;However, leaving a TWAIN session open is not a good idea, since it interferes with the Faxing capability of the 3150.<br />
<br />
Basically, I need suggestions as to what approach I should take. &nbsp;Tools that could be used, methods of attack, etc. would be good. &nbsp;Points distributed for quality of suggestions, with multiple people being point receivers.
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I am looking for approaches to intecepting the call between a printer and a memory-resident program on a Win9x system.

We are using HP Laserjet 3150 and 3200 multifunction printers.  I am trying to intercept the 'pop-up' call that loads the Jetsuite front-end whenever paper is placed into the 3150's Scan/Fax tray, and pop up a VB program instead of the default program.  If there is already a TWAIN session open on the PC, then the pop-up doesn't happen.  If not, it will happen.  However, leaving a TWAIN session open is not a good idea, since it interferes with the Faxing capability of the 3150.

Basically, I need suggestions as to what approach I should take.  Tools that could be used, methods of attack, etc. would be good.  Points distributed for quality of suggestions, with multiple people being point receivers.

Intercept program wakeup call - Scanner

Visual Basic is Microsoft’s event-driven programming language and integrated development environment (IDE) for its Component Object Model (COM) programming model. It is relatively easy to learn and use because of its graphical development features and BASIC heritage. It has been replaced with VB.NET, and is very similar to VBA (Visual Basic for Applications), the programming language for the Microsoft Office product line.