Call this member function to change the layout of the text and graphics for a device context to right to left, the standard layout for cultures such as Arabic and Hebrew.
Device context layout and bitmap control flags. It can be a combination of the following values.
Sets the default horizontal layout to be right to left.
Sets the default layout to be left to right.
If successful, the previous layout of the device context.
If unsuccessful, GDI_ERROR. To get extended error information, call GetLastError.
Normally, you would not call SetLayout for a window. Rather, you control the right-to-left layout in a window by setting the extended window styles such as WS_EX_RTLREADING. A device context, such as a printer or a metafile, does not inherit this layout. The only way to set the device context for a right-to-left layout is by calling SetLayout.
If you call SetLayout( LAYOUT_RTL ), SetLayout automatically changes the mapping mode to MM_ISOTROPIC. As a result, a subsequent call to GetMapMode will return MM_ISOTROPIC instead of MM_TEXT.
In some cases, such as with many bitmaps, you may want to preserve the left-to-right layout. In these cases, render the image by calling BitBlt or StretchBlt, then set the bitmap control flag for dwLayout to LAYOUT_BITMAPORIENTATIONPRESERVED.
Once you change the layout with the LAYOUT_RTL flag, the flags normally specifying right or left are reversed. To avoid confusion, you may want to define alternate names for the standard flags. For a list of suggested alternate flag names, see SetLayout in the Windows SDK.