PRB: Object Appears Larger During Visual Editing

RESOLUTION

LPtoDP is dependent on the current mapping mode to perform a conversion from logical points to device points. For a more accurate transformation, a function must be written to "manually" convert the units from MM_HIMETRIC to MM_TEXT by using GetDeviceCaps to get the logical pixels per inch for use in the conversion. The OLE2UI library, included with the OLE 2.0 toolkit, already includes several transformation functions to properly convert the units:

FUNCTION	DESCRIPTION
XformWidthInPixelsToHimetric	Converts an int width into HiMetric units
XformWidthInHimetricToPixels	Converts an int width from HiMetric units
XformHeightInPixelsToHimetric	Converts an int height into HiMetric units
XformHeightInHimetricToPixels	Converts an int height from HiMetric units
XformRectInPixelsToHimetric	Converts a rect into HiMetric units
XformRectInHimetricToPixels	Converts a rect from HiMetric units
XformSizeInPixelsToHimetric	Converts a SIZEL into HiMetric units
XformSizeInHimetricToPixels	Converts a SIZEL from HiMetric units

For more information on these functions, consult the "User Interface Dialog Help" help file (OLE2UI.HLP) included with the OLE 2.0 toolkit.