IVsHierarchyDropDataTarget.DragOver Method

项目
04/26/2010

Called when one or more items are dragged over the target hierarchy or hierarchy window.

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

Syntax

声明
Function DragOver ( _
    grfKeyState As UInteger, _
    itemid As UInteger, _
    <OutAttribute> ByRef pdwEffect As UInteger _
) As Integer
用法
Dim instance As IVsHierarchyDropDataTarget
Dim grfKeyState As UInteger
Dim itemid As UInteger
Dim pdwEffect As UInteger
Dim returnValue As Integer

returnValue = instance.DragOver(grfKeyState, _
    itemid, pdwEffect)

int DragOver(
    uint grfKeyState,
    uint itemid,
    out uint pdwEffect
)

int DragOver(
    [InAttribute] unsigned int grfKeyState, 
    [InAttribute] unsigned int itemid, 
    [InAttribute] [OutAttribute] unsigned int% pdwEffect
)

abstract DragOver : 
        grfKeyState:uint32 * 
        itemid:uint32 * 
        pdwEffect:uint32 byref -> int

function DragOver(
    grfKeyState : uint, 
    itemid : uint, 
    pdwEffect : uint
) : int

Parameters

grfKeyState
Type: System.UInt32
[in] Current state of the keyboard keys and the mouse modifier buttons. Valid values are shown in the following table. These values can be combined using a bitwise OR operator.

Hex	Value	Description
0x0001	MK_LBUTTON	Left mouse button is clicked.
0x0002	MK_RBUTTON	Right mouse button is clicked.
0x0004	MK_SHIFT	SHIFT key is pressed.
0x0008	MK_CONTROL	CONTROL key is pressed.
0x0010	MK_MBUTTON	Middle mouse button is clicked.
0x0020	MK_ALT	ALT key is pressed.

itemid
Type: System.UInt32
[in] Item identifier of the drop data target over which the item is being dragged. For a list of itemid values, see VSITEMID.

pdwEffect
Type: System.UInt32%
[in, out] On entry, pointer to the value of the pdwEffect parameter of the IVsHierarchy object, identifying all effects that the hierarchy supports. On return, the pdwEffect parameter must contain one of the effect flags that indicate the result of the drop operation. For a list of pwdEffects values, see DragEnter.

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 IVsHierarchyDropDataTarget::DragOver(
   [in]DWORD grfKeyState,
   [in]VSITEMID itemid,
   [in, out]DWORD * pdwEffect
);

The function passes the state of the keyboard keys and mouse modifier buttons (whether one or more is being pressed).

.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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