IVsFontAndColorEvents.OnFontChanged Method

Artikel
02/23/2010

Called by the Visual Studio environment when the fonts of one Categories of the items listed in the Display Items drop-down list is modified.

Namespace: Microsoft.VisualStudio.Shell.Interop
Assembly: Microsoft.VisualStudio.Shell.Interop (in Microsoft.VisualStudio.Shell.Interop.dll)

Syntax

'Declaration
Function OnFontChanged ( _
    ByRef rguidCategory As Guid, _
    pInfo As FontInfo(), _
    pLOGFONT As LOGFONTW(), _
    HFONT As UInteger _
) As Integer
'Usage
Dim instance As IVsFontAndColorEvents
Dim rguidCategory As Guid
Dim pInfo As FontInfo()
Dim pLOGFONT As LOGFONTW()
Dim HFONT As UInteger
Dim returnValue As Integer

returnValue = instance.OnFontChanged(rguidCategory, _
    pInfo, pLOGFONT, HFONT)

int OnFontChanged(
    ref Guid rguidCategory,
    FontInfo[] pInfo,
    LOGFONTW[] pLOGFONT,
    uint HFONT
)

int OnFontChanged(
    [InAttribute] Guid% rguidCategory, 
    [InAttribute] array<FontInfo>^ pInfo, 
    [InAttribute] array<LOGFONTW>^ pLOGFONT, 
    [InAttribute] unsigned int HFONT
)

abstract OnFontChanged : 
        rguidCategory:Guid byref * 
        pInfo:FontInfo[] * 
        pLOGFONT:LOGFONTW[] * 
        HFONT:uint32 -> int

function OnFontChanged(
    rguidCategory : Guid, 
    pInfo : FontInfo[], 
    pLOGFONT : LOGFONTW[], 
    HFONT : uint
) : int

Parameters

rguidCategory
Type: System.Guid%
[in] Specifies the GUID of the affected category. Compare this GUID to the GUID of your category to determine whether the event applies to your VSPackage.

pInfo
Type: array<Microsoft.VisualStudio.Shell.Interop.FontInfo[]
[in] Pointer to a FontInfo structure that contains font identification information.

pLOGFONT
Type: array<Microsoft.VisualStudio.Shell.Interop.LOGFONTW[]
[in] Pointer to a LOGFONTW structure containing the attributes of the font.

HFONT
Type: System.UInt32
[in] Pointer to a font object.

Return Value

Type: System.Int32
If the method succeeds, it returns S_OK. If it fails, it returns an error code.

Remarks

COM Signature

From vsshell.idl:

HRESULT IVsFontAndColorEvents::OnFontChanged(
   [in] REFGUID rguidCategory,
   [in] const FontInfo *pInfo,
   [in] const LOGFONTW *pLOGFONT,
   [in] HFONT hFont
);

Fonts are defined for on a Category basis, not a Display Items basis: all DisplayItems in a Category share the same font.

The bFaceNameValid, bPointSizeValid, and bCharSetValid, members of the returned FontInfo object (pInfo) indicate whether the corresponding font attributes have changed. Invalid attributes should be ignored. If all attributes are marked as invalid, pLOGFONT is NULL (C++) or nulla null reference (Nothing in Visual Basic) (C#).

The hFont parameter is included so that you need not create two separate HFONT objects, as creating an HFONT object is a resource-intensive activity. The parameter may be nulla null reference (Nothing in Visual Basic), in which case the method creates an HFONT object as needed.

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

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