public static bool UninstallModem(string COMPort)
{
Guid classguid = new Guid("4d36e96d-e325-11ce-bfc1-08002be10318");
IntPtr hDeviceInfoSet = Win32Wrapper.SetupDiGetClassDevs(ref classguid, IntPtr.Zero, IntPtr.Zero, (uint)Win32Wrapper.DIGCF.DIGCF_PRESENT);
bool matchFound = false;
if (hDeviceInfoSet != IntPtr.Zero && hDeviceInfoSet.ToInt64() != INVALID_HANDLE_VALUE)
{
Win32Wrapper.SP_DEVINFO_DATA devInfoElem = new Win32Wrapper.SP_DEVINFO_DATA();
uint index = 0;
devInfoElem.cbSize = (uint)Marshal.SizeOf(devInfoElem);
while (Win32Wrapper.SetupDiEnumDeviceInfo(hDeviceInfoSet, index, ref devInfoElem))
{
index = index + 1;
IntPtr hKeyDev = Win32Wrapper.SetupDiOpenDevRegKey(hDeviceInfoSet, ref devInfoElem, (uint)Win32Wrapper.DICS_FLAG.DICS_FLAG_GLOBAL, 0, (uint)Win32Wrapper.DIREG.DIREG_DRV, (uint)Win32Wrapper.REGKEYSECURITY.KEY_READ);
int test = Marshal.GetLastWin32Error();
StringBuilder szDevDesc = new StringBuilder(20, 256);
if (hKeyDev.ToInt64() != INVALID_HANDLE_VALUE)
{
uint pData = 256;
uint lpType = 0;
int res = Win32Wrapper.RegQueryValueEx(hKeyDev, "AttachedTo", 0, out lpType, szDevDesc, ref pData);
if (res == (int)Win32Wrapper.WinErrors.ERROR_SUCCESS)
{
Win32Wrapper.RegCloseKey(hKeyDev);
if (COMPort == szDevDesc.ToString())
{
Console.WriteLine(String.Format("Found : {0}", COMPort));
matchFound = true;
uint DIF_REMOVE = 0x00000005;
if (!Win32Wrapper.SetupDiCallClassInstaller(DIF_REMOVE, hDeviceInfoSet, ref devInfoElem))
{
Win32Wrapper.SetupDiDestroyDeviceInfoList(hDeviceInfoSet);
}
break;
}
}
}
}
}
return(matchFound);
}