From Tracker Software PDF SDK
The method rotates the specified image page in 90 degree steps.
HRESULT Rotate([in] IXC_FastRotate nAngle);
- [in] Value of IXC_FastRotate specifies the angle for rotating.
Returns S_OK if operation was successful or error code in other cases.
Pages are rotated in 90 degree steps. See the IIXC_Page::FreeRotate to Rotate a page by a specified angle.