BCGSuite for MFC
void CBCGPDrawManager::MirrorRect ( CRect  rect,
BOOL  bHorz = TRUE 
)

Flips a rectangular area horizontally.

Use this method to flip horizontally a rectangular area of device context owned by the draw manager.

Parameters
rectSpecifies the bounding rectangle of the area to flip.
bHorzTRUE - horizontal flipping, FALSE - vertical flipping.