public static extern int SHLoadIndirectString(string pszSource, StringBuilder pszOutBuf, int cchOutBuf, IntPtr ppvReserved);

    Public Declare Auto Function SHLoadIndirectString Lib "shlwapi.dll" (ByVal pszSource As String, ByVal pszOutBuf As String, ByVal cchOutBuf As UInteger, ByVal ppvReserved As IntPtr) As UInteger

int result = SHLoadIndirectString(resourcePath, outBuff, -1, IntPtr.Zero);

//SHLoadIndirectString returns S_OK (0) if successful

int result = SHLoadIndirectString(sWin8ManifestString, outBuff, outBuff.Capacity, IntPtr.Zero);