IVsHierarchyDropDataTarget.DragOver Method

Статья
03/06/2013

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

'Declaration
Function DragOver ( _
    grfKeyState As UInteger, _
    itemid As UInteger, _
    <OutAttribute> ByRef pdwEffect As UInteger _
) As Integer

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.
[1|1] Hex
[1|2] Value
[1|3] Description
[2|1] 0x0001
[2|2] MK_LBUTTON
[2|3] Left mouse button is clicked.
[3|1] 0x0002
[3|2] MK_RBUTTON
[3|3] Right mouse button is clicked.
[4|1] 0x0004
[4|2] MK_SHIFT
[4|3] SHIFT key is pressed.
[5|1] 0x0008
[5|2] MK_CONTROL
[5|3] CONTROL key is pressed.
[6|1] 0x0010
[6|2] MK_MBUTTON
[6|3] Middle mouse button is clicked.
[7|1] 0x0020
[7|2] MK_ALT
[7|3] 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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