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52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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#pragma once
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#include <cstdint>
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#include <oleidl.h>
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#include "DragDropEffects.h"
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namespace Forms
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{
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// Defined elsewhere
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class Control;
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// Handles drag and drop events for a target control.
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class DropTarget : public IDropTarget
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{
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public:
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DropTarget(Control* Target);
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~DropTarget() = default;
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virtual HRESULT STDMETHODCALLTYPE DragEnter(
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/* [unique][in] */ __RPC__in_opt IDataObject *pDataObj,
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ __RPC__inout DWORD *pdwEffect);
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virtual HRESULT STDMETHODCALLTYPE DragOver(
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ __RPC__inout DWORD *pdwEffect);
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virtual HRESULT STDMETHODCALLTYPE DragLeave();
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virtual HRESULT STDMETHODCALLTYPE Drop(
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/* [unique][in] */ __RPC__in_opt IDataObject *pDataObj,
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/* [in] */ DWORD grfKeyState,
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/* [in] */ POINTL pt,
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/* [out][in] */ __RPC__inout DWORD *pdwEffect);
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(
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/* [in] */ REFIID riid,
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/* [iid_is][out] */ _COM_Outptr_ void __RPC_FAR *__RPC_FAR *ppvObject);
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virtual ULONG STDMETHODCALLTYPE AddRef(void);
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virtual ULONG STDMETHODCALLTYPE Release(void);
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private:
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// Internal cached control
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Control* _Target;
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DragDropEffects _LastEffect;
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IDataObject* _LastObject;
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};
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}
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