Where i can get the instance id of Com_port? I tried in device manager but those are not working
string instance_Path = @"VID_12D1&PID_140C&MI_02";
DeviceHelper.SetDeviceEnabled(mouseGuid, instance_Path, true);
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Roman R.
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user3459969
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What is "mouseGuid"? Are the process working with administrator rights? – enkryptor Oct 04 '15 at 09:40
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yeah i logged with admin login only – user3459969 Oct 04 '15 at 10:06
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I mean, you must run a process with elevated privileges in order to enable/disable devices with it (unless you are using windows xp). – enkryptor Oct 04 '15 at 10:24
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can you please help to run process with privilege – user3459969 Oct 04 '15 at 12:32
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What do you mean "are not working"? You get UnauthorizedAccessException if the problem is the access right. Could it be you're just specifying a wrong GUID? – enkryptor Oct 05 '15 at 06:05
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This question is virtually a duplicate - Win32 API function to programmatically enable/disable device
"mouseGuid" might be pasted from there. I suppose you're specifying a wrong GUID for the COM port. You can see the correct one in the Device Manager, Details tab -> choose "Class Guid" from the dropdown menu.
Having troubles messing with WinAPI, you can use a library (e.g. Hardware Helper) or an external tool (DevCon).
