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Fired before a retargeting change occurs. This is the first event sent to subscribers. The subscriber can choose to cancel retargeting on receiving this event.
Namespace:  Microsoft.VisualStudio.Shell.Interop
Assembly:  Microsoft.VisualStudio.Shell.Interop.10.0 (in Microsoft.VisualStudio.Shell.Interop.10.0.dll)
Syntax
'Declaration
Function OnRetargetingBeforeChange ( _
    projRef As String, _
    pBeforeChangeHier As IVsHierarchy, _
    currentTargetFramework As String, _
    newTargetFramework As String, _
    <OutAttribute> ByRef pCanceled As Boolean, _
    <OutAttribute> ByRef ppReasonMsg As String _
) As Integer
int OnRetargetingBeforeChange(
    string projRef,
    IVsHierarchy pBeforeChangeHier,
    string currentTargetFramework,
    string newTargetFramework,
    out bool pCanceled,
    out string ppReasonMsg
)
int OnRetargetingBeforeChange(
    [InAttribute] String^ projRef, 
    [InAttribute] IVsHierarchy^ pBeforeChangeHier, 
    [InAttribute] String^ currentTargetFramework, 
    [InAttribute] String^ newTargetFramework, 
    [OutAttribute] bool% pCanceled, 
    [OutAttribute] String^% ppReasonMsg
)
abstract OnRetargetingBeforeChange : 
        projRef:string * 
        pBeforeChangeHier:IVsHierarchy * 
        currentTargetFramework:string * 
        newTargetFramework:string * 
        pCanceled:bool byref * 
        ppReasonMsg:string byref -> int
function OnRetargetingBeforeChange(
    projRef : String, 
    pBeforeChangeHier : IVsHierarchy, 
    currentTargetFramework : String, 
    newTargetFramework : String, 
    pCanceled : boolean, 
    ppReasonMsg : String
) : int
Parameters
- projRef 
 Type: String- [in] The unique project reference name. 
- pBeforeChangeHier 
 Type: Microsoft.VisualStudio.Shell.Interop.IVsHierarchy- [in] The project hierarchy before the change. 
- currentTargetFramework 
 Type: String- [in] The current target framework of the project. 
- newTargetFramework 
 Type: String- [in] The new target framework of the project. 
- pCanceled 
 Type: Boolean%- [out] If true, retargeting was canceled by one of the subscribers. 
- ppReasonMsg 
 Type: String%- [out] A message string containing the reason why the cancelation occurred. 
Return Value
Type: Int32
If the method succeeds, it returns S_OK. If it fails, it returns an error code.
.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.