The following example demonstrates how a dialog box procedure creates a simple list box and fills it with the names of people on a softball team. When a name in the list is selected, additional information about the player is displayed in the dialog box. The following illustration shows the dialog box.
The list box has the LBS_STANDARD style, a combination of LBS_SORT, LBS_NOTIFY, WS_VSCROLL, and WS_BORDER. The code initializes the dialog box while processing the WM_INITDIALOG message. For each name that appears in the list box, the code sends an LB_ADDSTRING message to the list box. By processing the LBN_SELCHANGE notification message, the code also keeps track of when the selection changes.
#define BUFFER MAX_PATH
#define NAMELENGTH 15
#define POSITIONLENGTH 20
#define TEAMSIZE 15
typedef struct {
TCHAR tchName[NAMELENGTH];
TCHAR tchPosition[POSITIONLENGTH];
int nGamesPlayed;
int nInningsPlayed;
double xBattingAverage;
TCHAR tchFoodName[NAMELENGTH];
} Player;
Player Roster[] = {
{"Pete", "shortstop", 26, 90, .608, "Rutabaga"},
{"Suzanna", "catcher", 16, 53, .286, "Toast"},
{"Jack", "pitcher", 27, 110, .542, "Animal Crackers"},
{"Karen", "second base", 26, 140, .238, "Pez"},
{"Dave", "first base", 28, 138, .508, "Suds"},
{"Wendy", "third base", 25, 154, .493, "Ham"},
{"Matt", "shortstop", 24, 112, .579, "Oats"},
{"Jenny", "right field", 22, 101, .509, "Mashed Potatoes"},
{"Seth", "left-center field", 20, 76, .407, "Otter Pop"},
{"Kathie", "left field", 26, 127, .353, "Baba Ganouj"},
{"Colin", "pitcher", 26, 96, .456, "Lefse"},
{"Penny", "right field", 24, 112, .393, "Zotz"},
{"Art", "left-center field", 17, 56, .375, "Cannelloni"},
{"Cindy", "second base", 13, 58, .207, "Tequila"},
{"David", "center field", 18, 101, .612, "Bok Choy"}
};
/*
* FUNCTION: DlgTeamProc(HWND, unsigned, UINT, LONG)
*
* PURPOSE: Dialog box for "BFG Softball Statistics"
*/
BOOL APIENTRY DlgTeamProc(
HWND hDlg, /* window handle of dialog box */
UINT message, /* type of message */
UINT wParam, /* message-specific information */
LONG lParam) /* message-specific information */
{
TCHAR tchBuffer[BUFFER];
int nItem;
int i;
HWND hwndList;
switch (message) {
case WM_INITDIALOG:
{
hwndList = GetDlgItem(hDlg, IDL_SOFTBALL);
/* Initialize the list box (fill it with player names). */
for (i = 0; i < TEAMSIZE; i++) {
SendMessage(hwndList, LB_ADDSTRING, 0,
(LPARAM) Roster[i].tchName);
SendMessage(hwndList, LB_SETITEMDATA, i, (LPARAM) i);
}
SetFocus(hwndList);
return FALSE;
}
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDL_SOFTBALL:
switch (HIWORD(wParam)) {
case LBN_SELCHANGE:
/* Show the selected player's statistics. */
hwndList = GetDlgItem(hDlg, IDL_SOFTBALL);
nItem = SendMessage(hwndList, LB_GETCURSEL,
0, 0);
i = SendMessage(hwndList, LB_GETITEMDATA,
nItem, 0);
SetDlgItemText(hDlg, IDS_POS,
Roster[i].tchPosition);
SetDlgItemText(hDlg, IDS_GAME,
_itoa(Roster[i].nGamesPlayed,
tchBuffer, 10));
SetDlgItemText(hDlg, IDS_INN,
_itoa(Roster[i].nInningsPlayed,
tchBuffer, 10));
SetDlgItemText(hDlg, IDS_BA,
_gcvt(Roster[i].xBattingAverage,
3, tchBuffer));
SetDlgItemText(hDlg, IDS_FOOD,
Roster[i].tchFoodName);
return TRUE;
}
break;
case IDOK:
case IDCANCEL:
/* Destroy the dialog box. */
EndDialog(hDlg, TRUE);
return TRUE;
default:
return FALSE;
}
default:
return FALSE;
}
}