Software by Virgo Software:

This Microsoft Visual Studio 2005 add-in allows you to watch the full content of Windows GDI handles (HDC, HBITMAP, HBRUSH, HFONT, HPALETTE, HPEN (including extended pens), HRGN, HICON, and HCURSOR) while debugging your image processing or UI programs. The add-in looks and behaves like a regular watch window and it works with programs written in C/C++ languages.