listing files in dialog box

I'm using DlgDirListComboBox(), to try and get files listed in my dialogs combo box.

this is the code for it,

Code:

BOOL CALLBACK DlgProc(HWND dhwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{

    switch(Message)
    {

	case WM_INITDIALOG:

               char *filelist;
               filelist = (char*)GlobalAlloc(GPTR,5);
               filelist = "*.bmp";

	DlgDirListComboBox((HWND)IDD_DIALOG1,//dialog's HWND?
			filelist,//just bmp's from current dir
			IDC_COMBO1,//combo box
			0,
			DDL_READWRITE);

               return FALSE;


               case WM_COMMAND:
               switch(LOWORD(wParam))
               {
                case IDC_BUTTON1:
                EndDialog(dhwnd, IDC_BUTTON1);//test button
                break;

                case IDCANCEL:
                EndDialog(dhwnd, IDCANCEL);
                break;
                }
                break;

        default:
            return FALSE;
    }
    return FALSE;


}//end of dialog routine



//dialogue ini, from main window proc

        case WM_LBUTTONDOWN:
			{
                int ret = DialogBox(GetModuleHandle(NULL), 
	MAKEINTRESOURC(IDD_DIALOG1),dhwnd,
                DlgProc);
			}

		return 0;

the problem is the files aren't showing, also when I used dhwnd instaed of (HWND)IDD_DIALOG1, for the dialogs handle, a mwmory error message came up
Thanks, hope some one can help.

Code:

char *filelist;
filelist = (char*)GlobalAlloc(GPTR,5);
filelist = "*.bmp";

This is your problem. To copy a string into an array, you must use strcpy or lstrcpy. When you do:

Code:

filelist = "*.bmp";

you set filelist to point to a read-only string and lose its previous contents, in this case the pointer to the memory you allocated on the previous line. DlgDirListComboBox() requires a read-write string so you get the memory error you describe.

Here is a better version:

Code:

// Note that this syntax creates a read-write string.
// On the other hand char * filelist = "*.bmp"; creates a read-only string.
char filelist[] = "*.bmp";
DlgDirListComboBox(dhwnd, filelist, IDC_COMBO1, 0, DDL_READWRITE);

P.S The end code tag is [/CODE] and the start code tag is [CODE]

Thanks, that works now.
I saw GlobalAlloc() in a tutorial recently, I thought it was a windows way of doing strings or something.

Thanks again