C# Definition:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct INSTALLERINFO
{
    [MarshalAs(UnmanagedType.LPWStr)] public string pApplicationId;
    [MarshalAs(UnmanagedType.LPWStr)] public string pDisplayName;
    [MarshalAs(UnmanagedType.LPWStr)] public string pProductName;
    [MarshalAs(UnmanagedType.LPWStr)] public string pMfgName;
}

VB Definition:

<StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)> _
Public Structure INSTALLERINFO
    (MarshalAs(UnmanagedType.LPWStr)) Public String pApplicationId
    (MarshalAs(UnmanagedType.LPWStr)) Public String pDisplayName
    (MarshalAs(UnmanagedType.LPWStr)) Public String pProductName
    (MarshalAs(UnmanagedType.LPWStr)) Public String pMfgName
End Structure

User-Defined Field Types:

None.

Notes:

None.