rotating a bitmap

[Arrun]

hi I am doing a pattern matching program uisng MFC, could anyone help me with the equations thats necessary to rotate the bitmap.

[namaskaaram]

i think there r already functionz that do those..... http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/_gdiplus_rotating_reflecting_and_skewing_images_usecsharp.asp[^] hope that helpz!!!!! :-D