Change the contents of the Public dialog box

In fact, the BCB Open dialog box is the standard dialog form that is invoked by Windows, so we can make some changes with the WINAPI function.

We add the following code to the OnShow event

void __fastcall TForm1::OpenDialog1Show(TObject *Sender)
{
HWND hwndDialog = GetParent(OpenDialog1->Handle);
HWND hwndButton = GetDlgItem(hwndDialog,1);
SetWindowText(hwndButton,"哈哈(&H)");
}

1. Notice what GetParent gets is actually a topendialog handle.

2. Then use the GetDlgItem () function to get the handle to the Open button in the dialog box. Note that Topendialog is a dialog box a form has a resource ID on each component of the dialog box. The resource ID for the Open button is 1. The same way you can change most of the content on a dialog form can change

3. Change the caption of the Open button to "haha (&h)"