Problem with Combo Box

**Jaken Veina** · 01-16-2009

Can't get a combo box to display its content. If I query for its content, it seems to be working fine. CB_GETCOUNT returns the correct number, for example. I'm not sure what to make of it...

Code:

DLG_MASTERCONFIGURE DIALOG 0, 0, 260, 140
.....
   BEGIN
      .....
      COMBOBOX                               IDCMB_SCREENNUM,   18, 88,  35,  13, CBS_DROPDOWNLIST | CBS_SORT | WS_VSCROLL
      .....
   END

Code:

    case WM_INITDIALOG:
     {
      int si;
      char ScreenNum[3];
      for(si = 1; si <= NumberOfScreens; ++si)
       {
        snprintf(ScreenNum, 3, "%i", si);
        SendDlgItemMessage(hDlg, IDCMB_SCREENNUM, CB_ADDSTRING, 0, (LPARAM)ScreenNum);
       }
     }
    break;

**Niara** · 01-16-2009

Because the combobox is too small (the height). Try to change to:

Code:

COMBOBOX IDCMB_SCREENNUM,18,88,35,100,CBS_DROPDOWNLIST|CBS_SORT|WS_VSCROLL

Now it will expand the list since 100px height, and if there's more items it will also show a vertical scroll bar.

Hope that helps
Niara

**Niara** · 01-16-2009

Ah, you can also set the first item selected using:

Code:

SendDlgItemMessage(hwnd,IDCMB_SCREENNUM,CB_SETCURSEL,(WPARAM)0,0);

Niara

**Jaken Veina** · 01-16-2009

The height corresponds to the list portion? That's annoying. Thanks for the tip.

**Niara** · 01-16-2009

Yes, the height in that case it corresponds to the max height that the expanded list can have. So if you set a height of 100px and 3 items to show each of 25px, it will show a list of 3*25px, but if you have 5 items it will show a list of 100px with a vertical scroll (if you have defined that the control can have a vscroll, of course). Or that's how I understand that, if it's wrong please correct

Niara

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