EM_SETPAGEROTATE message

[EM_SETPAGEROTATE is available for use in the operating systems specified in the Requirements section. It may be altered or unavailable in subsequent versions.]

Sets the text layout for a rich edit control.

wParam

Text layout value. This can be one of the following values.

Expand table

Value	Meaning
EPR_0	Text flows from left to right and from top to bottom.
EPR_90	Text flows from bottom to top and from left to right.
EPR_180	Text flows from right to left and from bottom to top.
EPR_270	Text flows from top to bottom and from right to left.
EPR_SE	Windows 8: Text flows top to bottom and left to right (Mongolian text layout).

lParam

Not used; must be zero.

Return value is the new text layout value.

This message sets the text layout for the entire document. However, embedded contents are not rotated and must be rotated separately by the application.

EM_GETPAGEROTATE