C# Signature:
[DllImport("kernel32.dll")]
static extern bool GetDefaultCommConfig(string lpszName, [In, Out] ref COMMCONFIG lpCC,
ref uint lpdwSize);
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
[DllImport("kernel32.dll")]
static extern bool GetDefaultCommConfig(string lpszName, [In, Out] ref COMMCONFIG lpCC, ref uint lpdwSize);
[StructLayout(LayoutKind.Sequential)]
internal struct DCB
{
public Int32 DCBLength;
public Int32 BaudRate;
public Int32 fBitField;
public Int16 wReserved;
public Int16 XonLim;
public Int16 XoffLim;
public Byte ByteSize;
public Byte Parity;
public Byte StopBits;
public Char XonChar;
public Char XoffChar;
public Char ErrorChar;
public Char EofChar;
public Char EvtChar;
public Int32 wReserved1;
}
[StructLayout(LayoutKind.Sequential)]
internal struct COMMCONFIG
{
public Int32 dwSize;
public Int16 wVersion;
public Int16 wReserved;
public DCB dcb;
public Int32 dwProviderSubType;
public Int32 dwProviderOffset;
public Int32 dwProviderSize;
public string wcProviderData;
}
private void ScanCommPorts(int maxComPortNumber)
{
COMMCONFIG cc = new COMMCONFIG();
uint sz = (uint)Marshal.SizeOf(cc);
for(int i=1; i<=maxComPortNumber; i++)
{
string comPortName = string.Format("COM{0}", i);
bool bSuccess = GetDefaultCommConfig(comPortName, ref cc, ref sz);
Console.WriteLine(string.Format("{0}: {1}", comPortName, bSuccess ? "Valid" : "Invalid"));
}
}
Alternative Managed API:
Do you know one? Please contribute it!
