How to rotate Bitmap in windows GDI?

Question

How would I go about rotating a Bitmap in Windows GDI,C++?

Answer 1

Sounds like you have to use PlgBlt. Take your rectangle's 4 corners as 2D Points, rotate them, then call PlgBlt.

From MSDN Bitmap Rotation:

To copy a bitmap into a parallelogram; use the PlgBlt function, which performs a bit-block transfer from a rectangle in a source device context into a parallelogram in a destination device context. To rotate the bitmap, an application must provide the coordinates, in world units, to be used for the corners of the parallelogram.