Catch WM_DEVICECHANGE sent by a DLL through my handful of application
Hello.
I use a DLL that manages a USB device and after the DEVICEARRIVAL event detection, sends me the WM_DEVICECHANGE message to notice me I do some actions.
'This function initializes the DLL USB. He scored the notification of USB device in the operating system. The
operating system now sends a WM_DEVICECHANGE message to hHandle. »
I give the DLL my handful of application in order to receive the message of windows:
"hHandle - Handle to the application that handles events of USB devices."
How to catch this message sent from the DLL through my handful of application?
Hope that I was clear.
Thank you.
Not exactly if this isn't the right answer, even if you can't make it to use it (I've tried in the past to use this command with unsatisfactory results, but I found another way to do wat I wanted to so I'll leave that aside...): I guess you can use RegisterWinMsgCallback to register a callback to execute when a message is sent to your application.
An alternative is to use InstallWinMsgCallback Toolbox of programming interface, as shown in the example \samples\toolbox\msgdemo.prj.
As always when it comes with the software development kit, be sure to use an error robust handling system when you use these functions.
Tags: NI Software
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