How can I change the position of OpenDialog?

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

I tried using SetWindowPos and MoveWindow to change the position of my OpenDialog but these API functions don't seem to work. How can I center my OpenDialog?

 

1.

  Start a new application.

 

2.

  Add an OpenDialog. Edit its OnShow event:

 

void __fastcall TForm1::OpenDialog1Show(TObject *Sender)

{

    TRect rect;

    GetWindowRect(GetParent(dynamic_cast<TOpenDialog*>

        (Sender)->Handle), &rect);

    const int DialogWidth  = rect.right - rect.left;

    const int DialogHeight = rect.bottom - rect.top;

 

    MoveWindow(GetParent(dynamic_cast<TOpenDialog*>

        (Sender)->Handle),

        (Width-DialogWidth)/2 + Left,

        (Height-DialogHeight)/2 + Top,

        DialogWidth, DialogHeight, true);

    Abort();

}

 

3.

  Add a Button. Edit its OnClick event:

 

void __fastcall TForm1::Button1Click(TObject *Sender)

{

    OpenDialog1->Execute();

}

 

The Abort procedure cancels the WM_NOTIFY message that Windows sends to its common dialogs. This allows you to change the position of OpenDialog.

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