How can I add controls to an OpenDialog?

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

I would like to add additional controls to the OpenDialog. Is it possible to extend this component?

 

 

1.

  Create using a resource editor or a text editor the appropriate dialog

      that will be merged with OpenDialog. For example, using C++Builder,

      go to File | New... and choose Text. Enter the following:

 

MYDIALOG DIALOG 0, 0, 200, 40

STYLE WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS

    | DS_3DLOOK | DS_CONTROL

FONT 8, "MS Sans Serif"

BEGIN

    CONTROL "This is an extended OpenDialog.",

    555, "STATIC", SS_LEFT | WS_CHILD |

    WS_VISIBLE, 5, 15, 195, 15

END

 

2.

  Save your resource file as MYDIALOG.RC.

 

3.

  Start a new application.

 

4.

  Go to Project | Add to Project... and choose MYDIALOG.RC.

 

5.

  Insert in your header file:

 

class TExOpenDialog : public TOpenDialog

{

public:

    __fastcall TExOpenDialog(TComponent *Owner);

};

 

6.

  Insert in your source code:

 

__fastcall TExOpenDialog::TExOpenDialog(TComponent *

    Owner) : TOpenDialog(Owner)

{

    Template = "MYDIALOG";

}

 

7.

  Add a Button. Edit its OnClick event:

 

void __fastcall TForm1::Button1Click(TObject *Sender)

{

    TExOpenDialog *Dialog = new TExOpenDialog(this);

    Dialog->Execute();

    delete Dialog;

}

 

Tips

- Some versions of C++Builder come with the Resource Workshop editor. You could use it to create your dialogs.

- Your dialog resource must have the following styles: WS_CHILD and WS_CLIPSIBLINGS.

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