Drag & Drop Files
How to enabled drag&drop from explorer to your window and retrieve a list of dropped files?
1. Enable your window (Form) to accept dropped files (DragAcceptFiles )
2. Add a message handler for WM_DROPFILES
3. Use DragQueryFile ( on WM_DROPFILES) to get the dropped files count and their full path.
C++:
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//---------------------------------------------------------------------------
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void __fastcall TForm1::FormCreate(TObject *Sender)
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{
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//enable drag&drop files
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DragAcceptFiles(this->Handle,true);
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}
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//---------------------------------------------------------------------------
C++:
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class TForm1 : public TForm
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{
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__published: // IDE-managed Components
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void __fastcall FormCreate(TObject *Sender);
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private: // User declarations
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void __fastcall WMDropFile(TWMDropFiles &Msg);
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public: // User declarations
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__fastcall TForm1(TComponent* Owner);
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BEGIN_MESSAGE_MAP
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//add message handler for WM_DROPFILES
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VCL_MESSAGE_HANDLER(WM_DROPFILES, TWMDropFiles, WMDropFile)
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END_MESSAGE_MAP(TComponent)
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};
C++:
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//---------------------------------------------------------------------------
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void __fastcall TForm1::WMDropFile(TWMDropFiles &Msg)
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{
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char filePath[MAX_PATH];
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TStringList *FilesDroped=new TStringList();
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//get dropped files count
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int cnt=::DragQueryFile((HDROP)Msg.Drop,0xFFFFFFFF,NULL,0);
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//get dropped files path
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for(int i=0;i<cnt;i++)
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{
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::DragQueryFile((HDROP)Msg.Drop, i,filePath,MAX_PATH);
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FilesDroped->Add(filePath);
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}
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ShowMessage(FilesDroped->Text);
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delete FilesDroped;
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}
related things:
Author: Raz | On February 10th, 2007 | C++ Builder, [ En ] | No Comments
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