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what is the value for IOCTL_SERIAL_GET_COMMSTATUS

Posted on 2011-03-22
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Last Modified: 2013-12-17
I am trying to make a call using this value but am unable to find the number for this or the reference I would need to put in to the "using" clause so my program would know what it is.

Are these values listed anywhere?
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Question by:jetbet
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Expert Comment

by:käµfm³d 👽
ID: 35194974
According to this file, is a macro function.
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by:jetbet
ID: 35195496
Do you know how I could use the following code to clear any pending communication errors?
C# Signature:

[DllImport("kernel32.dll", ExactSpelling = true, SetLastError = true, CharSet = CharSet.Auto)]
static extern bool DeviceIoControl(IntPtr hDevice, uint dwIoControlCode,
IntPtr lpInBuffer, uint nInBufferSize,
IntPtr lpOutBuffer, uint nOutBufferSize,
out uint lpBytesReturned, IntPtr lpOverlapped);

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graye earned 2000 total points
ID: 35195626
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Author Comment

by:jetbet
ID: 35202131
That looks good although when I run the code the comm port cannot be opened as (according to getlasterror) "The system cannot find the file specified".

This may be due to using a usb to serial adaptor.

I will leave this question open for another day while I try and find the solution to this, and then assign the points to you.
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Author Closing Comment

by:jetbet
ID: 35286626
Thanks for your help. It seams OK if you only use Com1
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