Hi Ken,
You can call the EnumPorts API to get the PORT_INFO_1 in .Net like this:
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)]
struct PORT_INFO_1
{
[MarshalAs(UnmanagedType.LPTStr)]
public string pName;
}
[DllImport("winspool.drv", CharSet=CharSet.Auto)]
static extern bool EnumPorts(string pName, int level, IntPtr bufptr,int
cbBuf, out int pcbNeeded, out int pcReturned);
int pcReturned = 0;
int pcbNeeded = 0;
IntPtr outb = IntPtr.Zero;
EnumPorts(null, 1, outb, 0, out pcbNeeded, out pcReturned);
outb = Marshal.AllocHGlobal(pcbNeeded+1);
EnumPorts(null, 1, outb, pcbNeeded, out pcbNeeded, out pcReturned);
PORT_INFO_1[] manyArr = new PORT_INFO_1[pcReturned];
IntPtr current = outb;
for (int i=0; i<pcReturned; i++)
{
manyArr[i] = (PORT_INFO_1) Marshal.PtrToStructure(current,
typeof(PORT_INFO_1));
current=(IntPtr)((int)current+Marshal.SizeOf(typeo f(PORT_INFO_1)));
}
Marshal.FreeHGlobal(outb);
You can use the same logic to get the PORT_INFO_2, then you can get the
information of certian port like by comparing the port name.
Hope this helps,
Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! -
www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------
| Content-Class: urn:content-classes:message
| From: "Ken" <kk*****@mindspring.com>
| Sender: "Ken" <kk*****@mindspring.com>
| Subject: I need clarification on how to use EnumPorts
| Date: Thu, 9 Oct 2003 09:49:08 -0700
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| Hello Everyone,
|
| I would like to use EnumPorts twice on my form. The first
| time I want to use Port_Info_1 to just list the Port
| Names. The second instance where I need EnumPorts , is
| when I receive the Combo.SelectedIndexChanged event. I
| want to use EnumPorts to get the Port_Info_2 based on the
| Port Name. I have it working for Port_Info_1, however I am
| having a problem understanding what I should send to
| EnumPorts(,,,,). How do I find the info for just that
| port? and how do I avoid getting errors when that port is
| listed, but it has no info?
|
| Thank You in Advance for Your Help,
| Ken
|
|
|
