How can I drop files in my ListBox?

How can I drop files in my ListBox?

Applies To: C++Builder 1 or higher
Category: Knowledge Base

I have to create an application that allows the user to drop files in my ListBox.

Start a new project using File | New Application.

Add a ListBox.

Edit the OnCreate event of your form:

void __fastcall TForm1::FormCreate(TObject *Sender)

{

DragAcceptFiles(ListBox1->Handle, true);

}

Open your header file:

private:

MESSAGE void __fastcall Drop(TWMDropFiles &);

BEGIN_MESSAGE_MAP

MESSAGE_HANDLER(WM_DROPFILES, TWMDropFiles, Drop);

END_MESSAGE_MAP(TForm);

Insert in your source code:

void __fastcall TForm1::Drop(TWMDropFiles &message)

{

int count = DragQueryFile((HDROP)message.Drop, 0xFFFFFFFFF,

NULL, 0);

for(int x = 0; x < count; x++)< count; x++)

{

char name[MAX_PATH];

DragQueryFile((HDROP)message.Drop, x, name, sizeof(name));

ListBox1->Items->Add(name);

}

DragFinish((HDROP)message.Drop);

}