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type
TMainForm = class(TForm)
...
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
...
private
procedure WMDropFiles(var Msg: TWMDROPFILES); message WM_DROPFILES;
...
end;
...
procedure TMainForm.FormCreate(Sender: TObject);
begin
{ files acceptor registration }
DragAcceptFiles(MainForm.WindowHandle, True);
end;
procedure TMainForm.FormDestroy(Sender: TObject);
begin
{ files acceptor unregistration }
DragAcceptFiles(MainForm.WindowHandle, False);
end;
procedure TMainForm.WMDropFiles(var Msg: TWMDropFiles);
var
CFileName: array [0..MAX_PATH] of Char;
WhichFiles: TStringList;
I, FilesCount: Integer;
begin
WhichFiles := TStringList.Create;
try
FilesCount := DragQueryFile(Msg.Drop, $FFFFFFFF, CFileName, MAX_PATH);
for I := 0 to Pred(FilesCount) do
begin
if DragQueryFile(Msg.Drop, I, CFileName, MAX_PATH) > 0 then
begin
WhichFiles.Add(CFileName);
end;
end;
if (WhichFiles.Count > 0) then
begin
Screen.Cursor := crHourGlass;
for I := 0 to Pred(WhichFiles.Count) do
begin
{ your code for processing list of filenames }
end;
Screen.Cursor := crDefault;
end;
finally
DragFinish(Msg.Drop);
WhichFiles.Free;
end;
end;
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Printable Version