public string findComponentCode(string productCode, string ComponentName)
  {
        int pathLen = 512;
        StringBuilder path = new StringBuilder(pathLen);
        IntPtr phDatabase = IntPtr.Zero;
        IntPtr hView = IntPtr.Zero;
        IntPtr hRecord = IntPtr.Zero;
        int componentCodeLen = 512;
        StringBuilder componentCode = new StringBuilder(componentCodeLen);

        MsiGetProductInfo(productCode, "LocalPackage", path, ref pathLen);
        MsiOpenDatabase(path.ToString(), IntPtr.Zero, ref phDatabase);
        MsiDatabaseOpenView(phDatabase, "SELECT * FROM `Component`", ref hView);
        MsiViewExecute(hView, hRecord);
        while (MsiViewFetch(hView, ref hRecord) != 259)
        {
            int bufferLen = 512;
            StringBuilder buffer = new StringBuilder(bufferLen);

            MsiRecordGetString(hRecord, 1, buffer, ref bufferLen);
            if (String.Compare(buffer.ToString(), ComponentName) == 0)
            {
                MsiRecordGetString(hRecord, 2, componentCode, ref componentCodeLen);
                break;
            }
        }
        MsiViewClose(hView);
        MsiCloseHandle(hRecord);
        MsiCloseHandle(phDatabase);
        return componentCode.ToString();
    }