PRB: Object Appears Larger During Visual Editing

• Microsoft OLE Libraries for Windows and Win32s, version 2.0
• Microsoft OLE Libraries, used with:
  • Microsoft Windows NT, versions 3.5, 3.51
  • Microsoft Windows 95

SYMPTOMS

An OLE 2.0 object appears larger during visual editing compared to the loaded state.

CAUSE

The Windows application programming interface (API) LPtoDP is being used to convert the size of the object from MM_HIMETRIC to MM_TEXT. The object is then drawn with the MM_TEXT coordinates as the bounding rectangle.

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.

Additional query words: 2.00 3.50 4.00

Keywords : kbole kbprg kbNTOS350 kbNTOS351 kbNTOS400 kbOLE200 kbGrpCom kbDSupport kbprb
Version : WINDOWS:2.0,95; :
Platform : WINDOWS
Issue type :