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Microsoft KB Archive/104791

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Knowledge Base


PRB: Object Appears Larger During Visual Editing

Article ID: 104791

Article Last Modified on 12/3/2003



APPLIES TO

  • Microsoft OLE 2.0
  • Microsoft OLE 4.0, when used with:
    • Microsoft Windows NT 4.0
    • Microsoft Windows NT 3.51 Service Pack 5
    • Microsoft Windows 95



This article was previously published under Q104791

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: kbprogramming kbprb KB104791