Initializing Combo Box

Hi and thanks for reading this.

I want to initialize a combo box.When I create the dialog, in which the box will be, I send CB_ADDSTRING to the box, but it doesn't works

Here is the code:

theWnd=CreateDialog(hInst,MAKEINTRESOURCE(IDD_PROB A),NULL,DlgProc);
i=GetLastError();
SendDlgItemMessage(theWnd,IDC_COMBO1,CB_ADDSTRING, 0,(LPARAM) "some text");
ShowWindow(theWnd, SW_SHOW);

If you can, please tell me why

Try sending the CB_ADDSTRING message within a WM_INITDIALOG message handler.

I believe you should do the following...

Code:

...
case WM_INITDIALOG:
    HWND hCB = GetDlgItem(hDlg, IDC_COMBO1); // Get HWND of Combo Box, hDlg is handle sent to DLGPROC
    SendMessage(hCB, CB_ADDSTRING, 0, (LPARAM)"Some Text");
    break;
....