IOleControlSite::TransformCoords

Converts between a POINTL structure expressed in HIMETRIC units (as is standard in OLE) and a POINTF structure expressed in units specified by the container. By converting the methods, the control can ensure that it sends coordinate information to the container in units that are directly usable in the container without additional conversion.

HRESULT TransformCoords(
  POINTL* pPtlHimetric ,  //Address of POINTL structure
  POINTF* pPtfContainer ,  //Address of POINTF structure
  DWORD dwFlags           //Flags indicating the exact conversion
);

Parameters

pptlHimetric

[in, out] Address of a POINTL structure containing coordinates expressed in HIMETRIC units. This is an [in] parameter when dwFlags contains XFORMCOORDS_HIMETRICTOCONTAINER; it is [out] with XFORMCOORDS_CONTAINERTOHIMETRIC. In the latter case, the contents are undefined on error.

pptfContainer

[in, out] Address of a caller-allocated POINTF structure that receives the converted coordinates. This is an [in] parameter when dwFlags contains XFORMCOORDS_CONTAINERTOHIMETRIC; it is [out] with XFORMCOORDS_HIMETRICTOCONTAINER. In the latter case, the contents are undefined on error.

dwFlags

[in] Flags indicating the exact conversion to perform. The dwFlags parameter can be any combination of the following values except where indicated:

Flag Value	Description
XFORMCOORDS_POSITION	The coordinates to convert represent a position point. Cannot be used with XFORMCOORDS_SIZE.
XFORMCOORDS_SIZE	The coordinates to convert represent a set of dimensions. Cannot be used with XFORMCOORDS_POSITION.
XFORMCOORDS_HIMETRICTOCONTAINER	The operation converts pptlHimetric into pptfContainer. Cannot be used with XFORMCOORDS_CONTAINERTOHIMETRIC.
XFORMCOORDS_CONTAINERTOHIMETRIC	The operation converts pptfContainer into pptlHimetric. Cannot be used with XFORMCOORDS_HIMETRICTOCONTAINER.

Return Values

This method supports the standard return values E_INVALIDARG and E_UNEXPECTED, as well as the following:

S_OK: The conversion was performed successfully.
E_NOTIMPL: The container does not require any special coordinate conversions. The container deals completely in HIMETRIC.
E_POINTER: The address in pptlHimetric or pptfContainer is not valid. For example, it may be NULL.

Remarks

A control uses this method when it has to send coordinates to a container within an event or some other custom call or when the control has container coordinates that it needs to convert into HIMETRIC units.

QuickInfo

  Windows NT: Use version 4.0 or later.
  Windows: Use Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in ocidl.h.