本文整理自网络，侵删。
1.引用 ShellAPI单元
2.定义AppOnMessage，拦截处理拖拽文件操作
3.设置接收拖拽文件的对象。DragAcceptFiles(listview1.Handle, True);
4.定义对拖拽文件的具体操作WMDropFiles(var Msg: TWMDropFiles);
unit Unit1; //Delphi从外部拖拽文件
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ComCtrls, StdCtrls;
type
TForm1 = class(TForm)
ListView1: TListView;
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
procedure WMDropFiles(var Msg: TWMDropFiles); message WM_DROPFILES;
procedure AppOnMessage(var Msg: TMsg; var Handled: Boolean);
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
uses ShellAPI;
{$R *.dfm}
procedure TForm1.AppOnMessage(var Msg: TMsg; var Handled: Boolean);
var
WMD: TWMDropFiles;
begin
if Msg.message = WM_DROPFILES then
begin
WMD.Msg := Msg.message;
WMD.Drop := Msg.wParam;
WMD.Unused := Msg.lParam;
WMD.Result := 0;
WMDropFiles(WMD);
Handled := TRUE;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
{ UAC权限 使用这三行
ChangeWindowMessageFilter(WM_DROPFILES, MSGFLT_ADD);
ChangeWindowMessageFilter(WM_COPYDATA, MSGFLT_ADD);
ChangeWindowMessageFilter(WM_COPYGLOBALDATA , MSGFLT_ADD);
}
DragAcceptFiles(listview1.Handle, True);
Application.OnMessage := AppOnMessage;
end;
procedure TForm1.WMDropFiles(var Msg: TWMDropFiles);
var
N: Word;
buffer: array[0..180] of Char;
item: TListItem;
begin
with Msg do
begin
for N := 0 to DragQueryFile(Drop, $FFFFFFFF, buffer, 1) - 1 do
begin
DragQueryFile(Drop, N, Buffer, 80);
Item := ListView1.Items.Add;
item.Caption := StrPas(Buffer);
end;
DragFinish(Drop);
end;
end;
end.
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