OHA Investment (OHAI) 10-Q 2010 Q1 Quarterly report

Exhibit 32.2

Certification required by Rule 13a-14(b) or

Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code

In connection with the Quarterly Report of NGP Capital Resources Company (the “Company”) on Form 10-Q for the period ended March 31, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Stephen K. Gardner, Chief Financial Officer, Treasurer and Secretary of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 10, 2010

/s/ Stephen K. Gardner

Stephen K. Gardner

Chief Financial Officer, Treasurer and Secretary