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RegisterDeviceNotification and device driver initialization.
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samsock
Apr 10, 2013, 7:52:36 AM4/10/13
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Hi ,
we are having a problem detecting our custom usb devices with RegisterDeviceNotification.
The problem seems to be that the notification WM_DEVICECHANGE reaches the application before the device driver has properly loaded. And this does not happen everytime , 70% of the times devices are successfully opened after receiving the notification. but otherwise they fail with "device not found" type messages.
So we want to know , does the WM_DEVICECHANGE message is sent after the complete and proper loading/initilization of the driver has taken place?
Thanks
we are having a problem detecting our custom usb devices with RegisterDeviceNotification.
The problem seems to be that the notification WM_DEVICECHANGE reaches the application before the device driver has properly loaded. And this does not happen everytime , 70% of the times devices are successfully opened after receiving the notification. but otherwise they fail with "device not found" type messages.
So we want to know , does the WM_DEVICECHANGE message is sent after the complete and proper loading/initilization of the driver has taken place?
Thanks
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