[Closed] Adding elements to a ComboBox

Dec 20, 2006 11:14 am

I use SendDlgItemMessage( HWND, IDC_COMBO, CB_ADDSTRING, 0 ,(lParam) (char *) “b” );
to add elements to my comboBox, but always is empty. Is there something wrong?

6 Replies

ypuech

Dec 20, 2006 11:14 am

Hi,

Try using LONG cast :

SendDlgItemMessage(HWND, IDC_COMBO, CB_ADDSTRING, 0 , (LONG)"b");

Excuse me but I cannot test win32 code on the PC I am :).

eledh_telamion

Dec 20, 2006 11:14 am

Yanick, I get that one element appears in the combo, but only one. It happens when I enter the command
SendDlgItemMessage( hDlg , IDC_COMBO , CB_SETCURSEL , 0 ,0 );

and the full commands for the comboBox are:

SendDlgItemMessage( hDlg , IDC_COMBO , CB_RESETCONTENT , 0 ,0 ); //empty the combo

for (int i=0;i<8;i++)
SendDlgItemMessage( hDlg , IDC_COMBO , CB_ADDSTRING, 0 , (LPARAM) (char *) “A”);

SendDlgItemMessage( hDlg , IDC_COMBO , CB_SETCURSEL , 0 ,0 );

ypuech

Dec 20, 2006 11:14 am

Hi Alex,

Maybe your problem comes from the resource (RC) :

I’ve set the ComboBox style to “Drop List”.
I’ve open the resource file and set “45” for the height of the ComboBox.

I think your code should run as expected.

eledh_telamion

Dec 20, 2006 11:14 am

Changed to droplist and nothing happens.
Opened RC file and found COMBOBOX but, where is height? There are 4 numbers. I supose that height is one of them, but which?

Despite of, thanks to you Yarick, you are helping me very much!