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GetApplicationUserModelId (kernel32)
Windows 8+. Gets the application user model ID for the specified process. For instance, reveals the application ID for HTML/JavaScript applications running inside wwahost.exe.

C# Signature:

[DllImport("kernel32.dll", SetLastError=true)]
internal static extern Int32 GetApplicationUserModelId(
    IntPtr hProcess,
    ref UInt32 AppModelIDLength,
    [MarshalAs(UnmanagedType.LPWStr)] StringBuilder sbAppUserModelID);

VB Signature:

Declare Function GetApplicationUserModelId Lib "kernel32.dll" (TODO) As TODO

User-Defined Types:

Alternative Managed API:

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Sample Code:

   const int QueryLimitedInformation = 0x1000;
   const int ERROR_INSUFFICIENT_BUFFER = 0x7a;
   const int ERROR_SUCCESS = 0x0;

   internal static extern IntPtr OpenProcess(int dwDesiredAccess, bool bInheritHandle, int dwProcessId);

   static extern bool CloseHandle(IntPtr hHandle);

   if (sProcessName.ToLower().Contains("wwahost")
        && ((Environment.OSVersion.Version.Major == 6) && (Environment.OSVersion.Version.Minor > 1)))
        IntPtr ptrProcess = OpenProcess(QueryLimitedInformation, false, iPID);
        if (IntPtr.Zero != ptrProcess)
            uint cchLen = 130;
            StringBuilder sbName = new StringBuilder((int)cchLen);
            Int32 lResult = GetApplicationUserModelId(ptrProcess, ref cchLen, sbName);
            if (ERROR_SUCCESS == lResult)
            sResult = sbName.ToString();
            else if (ERROR_INSUFFICIENT_BUFFER == lResult)
            sbName = new StringBuilder((int)cchLen);
            if (ERROR_SUCCESS == GetApplicationUserModelId(ptrProcess, ref cchLen, sbName))
                sResult = sbName.ToString();


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